net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  */
   7
   8 #include <linux/if.h>
   9 #include <linux/module.h>
  10 #include <linux/err.h>
  11 #include <linux/slab.h>
  12 #include <linux/list.h>
  13 #include <linux/if_ether.h>
  14 #include <linux/ieee80211.h>
  15 #include <linux/nl80211.h>
  16 #include <linux/rtnetlink.h>
  17 #include <linux/netlink.h>
  18 #include <linux/etherdevice.h>
  19 #include <net/net_namespace.h>
  20 #include <net/genetlink.h>
  21 #include <net/cfg80211.h>
  22 #include <net/sock.h>
  23 #include <net/inet_connection_sock.h>
  24 #include "core.h"
  25 #include "nl80211.h"
  26 #include "reg.h"
  27 #include "rdev-ops.h"
  28
  29 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  30                                    struct genl_info *info,
  31                                    struct cfg80211_crypto_settings *settings,
  32                                    int cipher_limit);
  33
  34 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
  35                             struct genl_info *info);
  36 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
  37                               struct genl_info *info);
  38
  39 /* the netlink family */
  40 static struct genl_family nl80211_fam = {
  41         .id = GENL_ID_GENERATE,         /* don't bother with a hardcoded ID */
  42         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
  43         .hdrsize = 0,                   /* no private header */
  44         .version = 1,                   /* no particular meaning now */
  45         .maxattr = NL80211_ATTR_MAX,
  46         .netnsok = true,
  47         .pre_doit = nl80211_pre_doit,
  48         .post_doit = nl80211_post_doit,
  49 };
  50
  51 /* multicast groups */
  52 enum nl80211_multicast_groups {
  53         NL80211_MCGRP_CONFIG,
  54         NL80211_MCGRP_SCAN,
  55         NL80211_MCGRP_REGULATORY,
  56         NL80211_MCGRP_MLME,
  57         NL80211_MCGRP_VENDOR,
  58         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  59 };
  60
  61 static const struct genl_multicast_group nl80211_mcgrps[] = {
  62         [NL80211_MCGRP_CONFIG] = { .name = NL80211_MULTICAST_GROUP_CONFIG },
  63         [NL80211_MCGRP_SCAN] = { .name = NL80211_MULTICAST_GROUP_SCAN },
  64         [NL80211_MCGRP_REGULATORY] = { .name = NL80211_MULTICAST_GROUP_REG },
  65         [NL80211_MCGRP_MLME] = { .name = NL80211_MULTICAST_GROUP_MLME },
  66         [NL80211_MCGRP_VENDOR] = { .name = NL80211_MULTICAST_GROUP_VENDOR },
  67 #ifdef CONFIG_NL80211_TESTMODE
  68         [NL80211_MCGRP_TESTMODE] = { .name = NL80211_MULTICAST_GROUP_TESTMODE }
  69 #endif
  70 };
  71
  72 /* returns ERR_PTR values */
  73 static struct wireless_dev *
  74 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  75 {
  76         struct cfg80211_registered_device *rdev;
  77         struct wireless_dev *result = NULL;
  78         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  79         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  80         u64 wdev_id;
  81         int wiphy_idx = -1;
  82         int ifidx = -1;
  83
  84         ASSERT_RTNL();
  85
  86         if (!have_ifidx && !have_wdev_id)
  87                 return ERR_PTR(-EINVAL);
  88
  89         if (have_ifidx)
  90                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  91         if (have_wdev_id) {
  92                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  93                 wiphy_idx = wdev_id >> 32;
  94         }
  95
  96         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  97                 struct wireless_dev *wdev;
  98
  99                 if (wiphy_net(&rdev->wiphy) != netns)
 100                         continue;
 101
 102                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
 103                         continue;
 104
 105                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
 106                         if (have_ifidx && wdev->netdev &&
 107                             wdev->netdev->ifindex == ifidx) {
 108                                 result = wdev;
 109                                 break;
 110                         }
 111                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 112                                 result = wdev;
 113                                 break;
 114                         }
 115                 }
 116
 117                 if (result)
 118                         break;
 119         }
 120
 121         if (result)
 122                 return result;
 123         return ERR_PTR(-ENODEV);
 124 }
 125
 126 static struct cfg80211_registered_device *
 127 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 128 {
 129         struct cfg80211_registered_device *rdev = NULL, *tmp;
 130         struct net_device *netdev;
 131
 132         ASSERT_RTNL();
 133
 134         if (!attrs[NL80211_ATTR_WIPHY] &&
 135             !attrs[NL80211_ATTR_IFINDEX] &&
 136             !attrs[NL80211_ATTR_WDEV])
 137                 return ERR_PTR(-EINVAL);
 138
 139         if (attrs[NL80211_ATTR_WIPHY])
 140                 rdev = cfg80211_rdev_by_wiphy_idx(
 141                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 142
 143         if (attrs[NL80211_ATTR_WDEV]) {
 144                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 145                 struct wireless_dev *wdev;
 146                 bool found = false;
 147
 148                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 149                 if (tmp) {
 150                         /* make sure wdev exists */
 151                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 152                                 if (wdev->identifier != (u32)wdev_id)
 153                                         continue;
 154                                 found = true;
 155                                 break;
 156                         }
 157
 158                         if (!found)
 159                                 tmp = NULL;
 160
 161                         if (rdev && tmp != rdev)
 162                                 return ERR_PTR(-EINVAL);
 163                         rdev = tmp;
 164                 }
 165         }
 166
 167         if (attrs[NL80211_ATTR_IFINDEX]) {
 168                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 169                 netdev = __dev_get_by_index(netns, ifindex);
 170                 if (netdev) {
 171                         if (netdev->ieee80211_ptr)
 172                                 tmp = wiphy_to_rdev(
 173                                         netdev->ieee80211_ptr->wiphy);
 174                         else
 175                                 tmp = NULL;
 176
 177                         /* not wireless device -- return error */
 178                         if (!tmp)
 179                                 return ERR_PTR(-EINVAL);
 180
 181                         /* mismatch -- return error */
 182                         if (rdev && tmp != rdev)
 183                                 return ERR_PTR(-EINVAL);
 184
 185                         rdev = tmp;
 186                 }
 187         }
 188
 189         if (!rdev)
 190                 return ERR_PTR(-ENODEV);
 191
 192         if (netns != wiphy_net(&rdev->wiphy))
 193                 return ERR_PTR(-ENODEV);
 194
 195         return rdev;
 196 }
 197
 198 /*
 199  * This function returns a pointer to the driver
 200  * that the genl_info item that is passed refers to.
 201  *
 202  * The result of this can be a PTR_ERR and hence must
 203  * be checked with IS_ERR() for errors.
 204  */
 205 static struct cfg80211_registered_device *
 206 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 207 {
 208         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 209 }
 210
 211 /* policy for the attributes */
 212 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 213         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 214         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 215                                       .len = 20-1 },
 216         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 217
 218         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 219         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 220         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 221         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 222         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 223
 224         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 225         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 226         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 227         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 228         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 229         [NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },
 230
 231         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 232         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 233         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 234
 235         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 236         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 237
 238         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 239         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 240                                     .len = WLAN_MAX_KEY_LEN },
 241         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 242         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 243         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 244         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 245         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 246
 247         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 248         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 249         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 250                                        .len = IEEE80211_MAX_DATA_LEN },
 251         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 252                                        .len = IEEE80211_MAX_DATA_LEN },
 253         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 254         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 255         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 256         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 257                                                .len = NL80211_MAX_SUPP_RATES },
 258         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 259         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 260         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 261         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 262                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 263         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 264
 265         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 266         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 267
 268         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 269         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 270         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 271         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 272                                            .len = NL80211_MAX_SUPP_RATES },
 273         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 274
 275         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 276         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 277
 278         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 279
 280         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 281         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 282                               .len = IEEE80211_MAX_DATA_LEN },
 283         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 284         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 285
 286         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 287                                 .len = IEEE80211_MAX_SSID_LEN },
 288         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 289         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 290         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 291         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 292         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 293         [NL80211_ATTR_STA_FLAGS2] = {
 294                 .len = sizeof(struct nl80211_sta_flag_update),
 295         },
 296         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 297         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 298         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 299         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 301         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 302         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 303         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 304         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 305                                  .len = WLAN_PMKID_LEN },
 306         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 307         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 308         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 309         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 310                                  .len = IEEE80211_MAX_DATA_LEN },
 311         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 312         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 313         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 314         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 315         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 316         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 317         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 318         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 319         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 320         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 321         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 322         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 323         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 324         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 325         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 326         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 327         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 328         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 329         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 330         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 331                                          .len = IEEE80211_MAX_DATA_LEN },
 332         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 333                                          .len = IEEE80211_MAX_DATA_LEN },
 334         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 335         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 336         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 337         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 338         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 339         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 340         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 341         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 342         [NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG },
 343         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 344         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 345                                       .len = IEEE80211_MAX_DATA_LEN },
 346         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 347         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 348         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 349                 .len = NL80211_HT_CAPABILITY_LEN
 350         },
 351         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 352         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 353         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 354         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 355         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 356         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 357         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 358         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 359         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 360         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 361         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 362         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 363         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 364         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 365         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 366         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 367         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 368                 .len = NL80211_VHT_CAPABILITY_LEN,
 369         },
 370         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 371         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 372                                   .len = IEEE80211_MAX_DATA_LEN },
 373         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 374         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 375         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 376         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 377         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
 378         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
 379         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 380         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 381         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 382         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 383         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 384         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 385         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 386         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 387                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 388         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 389         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 390         [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
 391         [NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG },
 392         [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
 393         [NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG },
 394         [NL80211_ATTR_TSID] = { .type = NLA_U8 },
 395         [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
 396         [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
 397         [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
 398         [NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
 399         [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
 400 };
 401
 402 /* policy for the key attributes */
 403 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 404         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 405         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 406         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 407         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 408         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 409         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 410         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 411         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 412 };
 413
 414 /* policy for the key default flags */
 415 static const struct nla_policy
 416 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 417         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 418         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 419 };
 420
 421 /* policy for WoWLAN attributes */
 422 static const struct nla_policy
 423 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 424         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 425         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 426         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 427         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 428         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 429         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 430         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 431         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 432         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 433         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 434 };
 435
 436 static const struct nla_policy
 437 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 438         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 439         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 440         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 441         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 442         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 443         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 444         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 445                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 446         },
 447         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 448                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 449         },
 450         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 451         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 452         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 453 };
 454
 455 /* policy for coalesce rule attributes */
 456 static const struct nla_policy
 457 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 458         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 459         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 460         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 461 };
 462
 463 /* policy for GTK rekey offload attributes */
 464 static const struct nla_policy
 465 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 466         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 467         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 468         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 469 };
 470
 471 static const struct nla_policy
 472 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 473         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 474                                                  .len = IEEE80211_MAX_SSID_LEN },
 475         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 476 };
 477
 478 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 479                                      struct netlink_callback *cb,
 480                                      struct cfg80211_registered_device **rdev,
 481                                      struct wireless_dev **wdev)
 482 {
 483         int err;
 484
 485         rtnl_lock();
 486
 487         if (!cb->args[0]) {
 488                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 489                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 490                                   nl80211_policy);
 491                 if (err)
 492                         goto out_unlock;
 493
 494                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 495                                                    nl80211_fam.attrbuf);
 496                 if (IS_ERR(*wdev)) {
 497                         err = PTR_ERR(*wdev);
 498                         goto out_unlock;
 499                 }
 500                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 501                 /* 0 is the first index - add 1 to parse only once */
 502                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 503                 cb->args[1] = (*wdev)->identifier;
 504         } else {
 505                 /* subtract the 1 again here */
 506                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 507                 struct wireless_dev *tmp;
 508
 509                 if (!wiphy) {
 510                         err = -ENODEV;
 511                         goto out_unlock;
 512                 }
 513                 *rdev = wiphy_to_rdev(wiphy);
 514                 *wdev = NULL;
 515
 516                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 517                         if (tmp->identifier == cb->args[1]) {
 518                                 *wdev = tmp;
 519                                 break;
 520                         }
 521                 }
 522
 523                 if (!*wdev) {
 524                         err = -ENODEV;
 525                         goto out_unlock;
 526                 }
 527         }
 528
 529         return 0;
 530  out_unlock:
 531         rtnl_unlock();
 532         return err;
 533 }
 534
 535 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 536 {
 537         rtnl_unlock();
 538 }
 539
 540 /* IE validation */
 541 static bool is_valid_ie_attr(const struct nlattr *attr)
 542 {
 543         const u8 *pos;
 544         int len;
 545
 546         if (!attr)
 547                 return true;
 548
 549         pos = nla_data(attr);
 550         len = nla_len(attr);
 551
 552         while (len) {
 553                 u8 elemlen;
 554
 555                 if (len < 2)
 556                         return false;
 557                 len -= 2;
 558
 559                 elemlen = pos[1];
 560                 if (elemlen > len)
 561                         return false;
 562
 563                 len -= elemlen;
 564                 pos += 2 + elemlen;
 565         }
 566
 567         return true;
 568 }
 569
 570 /* message building helper */
 571 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 572                                    int flags, u8 cmd)
 573 {
 574         /* since there is no private header just add the generic one */
 575         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 576 }
 577
 578 static int nl80211_msg_put_channel(struct sk_buff *msg,
 579                                    struct ieee80211_channel *chan,
 580                                    bool large)
 581 {
 582         /* Some channels must be completely excluded from the
 583          * list to protect old user-space tools from breaking
 584          */
 585         if (!large && chan->flags &
 586             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 587                 return 0;
 588
 589         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 590                         chan->center_freq))
 591                 goto nla_put_failure;
 592
 593         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 594             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 595                 goto nla_put_failure;
 596         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 597                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 598                         goto nla_put_failure;
 599                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 600                         goto nla_put_failure;
 601         }
 602         if (chan->flags & IEEE80211_CHAN_RADAR) {
 603                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 604                         goto nla_put_failure;
 605                 if (large) {
 606                         u32 time;
 607
 608                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 609
 610                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 611                                         chan->dfs_state))
 612                                 goto nla_put_failure;
 613                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 614                                         time))
 615                                 goto nla_put_failure;
 616                         if (nla_put_u32(msg,
 617                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 618                                         chan->dfs_cac_ms))
 619                                 goto nla_put_failure;
 620                 }
 621         }
 622
 623         if (large) {
 624                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 625                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 626                         goto nla_put_failure;
 627                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 628                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 629                         goto nla_put_failure;
 630                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 631                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 632                         goto nla_put_failure;
 633                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 634                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 635                         goto nla_put_failure;
 636                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 637                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 638                         goto nla_put_failure;
 639                 if ((chan->flags & IEEE80211_CHAN_GO_CONCURRENT) &&
 640                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_GO_CONCURRENT))
 641                         goto nla_put_failure;
 642                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 643                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 644                         goto nla_put_failure;
 645                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 646                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 647                         goto nla_put_failure;
 648         }
 649
 650         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 651                         DBM_TO_MBM(chan->max_power)))
 652                 goto nla_put_failure;
 653
 654         return 0;
 655
 656  nla_put_failure:
 657         return -ENOBUFS;
 658 }
 659
 660 /* netlink command implementations */
 661
 662 struct key_parse {
 663         struct key_params p;
 664         int idx;
 665         int type;
 666         bool def, defmgmt;
 667         bool def_uni, def_multi;
 668 };
 669
 670 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 671 {
 672         struct nlattr *tb[NL80211_KEY_MAX + 1];
 673         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 674                                    nl80211_key_policy);
 675         if (err)
 676                 return err;
 677
 678         k->def = !!tb[NL80211_KEY_DEFAULT];
 679         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 680
 681         if (k->def) {
 682                 k->def_uni = true;
 683                 k->def_multi = true;
 684         }
 685         if (k->defmgmt)
 686                 k->def_multi = true;
 687
 688         if (tb[NL80211_KEY_IDX])
 689                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 690
 691         if (tb[NL80211_KEY_DATA]) {
 692                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 693                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 694         }
 695
 696         if (tb[NL80211_KEY_SEQ]) {
 697                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 698                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 699         }
 700
 701         if (tb[NL80211_KEY_CIPHER])
 702                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 703
 704         if (tb[NL80211_KEY_TYPE]) {
 705                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 706                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 707                         return -EINVAL;
 708         }
 709
 710         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 711                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 712                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 713                                        tb[NL80211_KEY_DEFAULT_TYPES],
 714                                        nl80211_key_default_policy);
 715                 if (err)
 716                         return err;
 717
 718                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 719                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 720         }
 721
 722         return 0;
 723 }
 724
 725 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 726 {
 727         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 728                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 729                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 730         }
 731
 732         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 733                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 734                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 735         }
 736
 737         if (info->attrs[NL80211_ATTR_KEY_IDX])
 738                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 739
 740         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 741                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 742
 743         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 744         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 745
 746         if (k->def) {
 747                 k->def_uni = true;
 748                 k->def_multi = true;
 749         }
 750         if (k->defmgmt)
 751                 k->def_multi = true;
 752
 753         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 754                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 755                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 756                         return -EINVAL;
 757         }
 758
 759         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 760                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 761                 int err = nla_parse_nested(
 762                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 763                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 764                                 nl80211_key_default_policy);
 765                 if (err)
 766                         return err;
 767
 768                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 769                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 770         }
 771
 772         return 0;
 773 }
 774
 775 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 776 {
 777         int err;
 778
 779         memset(k, 0, sizeof(*k));
 780         k->idx = -1;
 781         k->type = -1;
 782
 783         if (info->attrs[NL80211_ATTR_KEY])
 784                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 785         else
 786                 err = nl80211_parse_key_old(info, k);
 787
 788         if (err)
 789                 return err;
 790
 791         if (k->def && k->defmgmt)
 792                 return -EINVAL;
 793
 794         if (k->defmgmt) {
 795                 if (k->def_uni || !k->def_multi)
 796                         return -EINVAL;
 797         }
 798
 799         if (k->idx != -1) {
 800                 if (k->defmgmt) {
 801                         if (k->idx < 4 || k->idx > 5)
 802                                 return -EINVAL;
 803                 } else if (k->def) {
 804                         if (k->idx < 0 || k->idx > 3)
 805                                 return -EINVAL;
 806                 } else {
 807                         if (k->idx < 0 || k->idx > 5)
 808                                 return -EINVAL;
 809                 }
 810         }
 811
 812         return 0;
 813 }
 814
 815 static struct cfg80211_cached_keys *
 816 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 817                        struct nlattr *keys, bool *no_ht)
 818 {
 819         struct key_parse parse;
 820         struct nlattr *key;
 821         struct cfg80211_cached_keys *result;
 822         int rem, err, def = 0;
 823
 824         result = kzalloc(sizeof(*result), GFP_KERNEL);
 825         if (!result)
 826                 return ERR_PTR(-ENOMEM);
 827
 828         result->def = -1;
 829         result->defmgmt = -1;
 830
 831         nla_for_each_nested(key, keys, rem) {
 832                 memset(&parse, 0, sizeof(parse));
 833                 parse.idx = -1;
 834
 835                 err = nl80211_parse_key_new(key, &parse);
 836                 if (err)
 837                         goto error;
 838                 err = -EINVAL;
 839                 if (!parse.p.key)
 840                         goto error;
 841                 if (parse.idx < 0 || parse.idx > 4)
 842                         goto error;
 843                 if (parse.def) {
 844                         if (def)
 845                                 goto error;
 846                         def = 1;
 847                         result->def = parse.idx;
 848                         if (!parse.def_uni || !parse.def_multi)
 849                                 goto error;
 850                 } else if (parse.defmgmt)
 851                         goto error;
 852                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 853                                                      parse.idx, false, NULL);
 854                 if (err)
 855                         goto error;
 856                 result->params[parse.idx].cipher = parse.p.cipher;
 857                 result->params[parse.idx].key_len = parse.p.key_len;
 858                 result->params[parse.idx].key = result->data[parse.idx];
 859                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 860
 861                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 862                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 863                         if (no_ht)
 864                                 *no_ht = true;
 865                 }
 866         }
 867
 868         return result;
 869  error:
 870         kfree(result);
 871         return ERR_PTR(err);
 872 }
 873
 874 static int nl80211_key_allowed(struct wireless_dev *wdev)
 875 {
 876         ASSERT_WDEV_LOCK(wdev);
 877
 878         switch (wdev->iftype) {
 879         case NL80211_IFTYPE_AP:
 880         case NL80211_IFTYPE_AP_VLAN:
 881         case NL80211_IFTYPE_P2P_GO:
 882         case NL80211_IFTYPE_MESH_POINT:
 883                 break;
 884         case NL80211_IFTYPE_ADHOC:
 885         case NL80211_IFTYPE_STATION:
 886         case NL80211_IFTYPE_P2P_CLIENT:
 887                 if (!wdev->current_bss)
 888                         return -ENOLINK;
 889                 break;
 890         case NL80211_IFTYPE_UNSPECIFIED:
 891         case NL80211_IFTYPE_OCB:
 892         case NL80211_IFTYPE_MONITOR:
 893         case NL80211_IFTYPE_P2P_DEVICE:
 894         case NL80211_IFTYPE_WDS:
 895         case NUM_NL80211_IFTYPES:
 896                 return -EINVAL;
 897         }
 898
 899         return 0;
 900 }
 901
 902 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 903                                                         struct nlattr *tb)
 904 {
 905         struct ieee80211_channel *chan;
 906
 907         if (tb == NULL)
 908                 return NULL;
 909         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 910         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 911                 return NULL;
 912         return chan;
 913 }
 914
 915 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 916 {
 917         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 918         int i;
 919
 920         if (!nl_modes)
 921                 goto nla_put_failure;
 922
 923         i = 0;
 924         while (ifmodes) {
 925                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 926                         goto nla_put_failure;
 927                 ifmodes >>= 1;
 928                 i++;
 929         }
 930
 931         nla_nest_end(msg, nl_modes);
 932         return 0;
 933
 934 nla_put_failure:
 935         return -ENOBUFS;
 936 }
 937
 938 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 939                                           struct sk_buff *msg,
 940                                           bool large)
 941 {
 942         struct nlattr *nl_combis;
 943         int i, j;
 944
 945         nl_combis = nla_nest_start(msg,
 946                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 947         if (!nl_combis)
 948                 goto nla_put_failure;
 949
 950         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 951                 const struct ieee80211_iface_combination *c;
 952                 struct nlattr *nl_combi, *nl_limits;
 953
 954                 c = &wiphy->iface_combinations[i];
 955
 956                 nl_combi = nla_nest_start(msg, i + 1);
 957                 if (!nl_combi)
 958                         goto nla_put_failure;
 959
 960                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 961                 if (!nl_limits)
 962                         goto nla_put_failure;
 963
 964                 for (j = 0; j < c->n_limits; j++) {
 965                         struct nlattr *nl_limit;
 966
 967                         nl_limit = nla_nest_start(msg, j + 1);
 968                         if (!nl_limit)
 969                                 goto nla_put_failure;
 970                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 971                                         c->limits[j].max))
 972                                 goto nla_put_failure;
 973                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 974                                                 c->limits[j].types))
 975                                 goto nla_put_failure;
 976                         nla_nest_end(msg, nl_limit);
 977                 }
 978
 979                 nla_nest_end(msg, nl_limits);
 980
 981                 if (c->beacon_int_infra_match &&
 982                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 983                         goto nla_put_failure;
 984                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 985                                 c->num_different_channels) ||
 986                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 987                                 c->max_interfaces))
 988                         goto nla_put_failure;
 989                 if (large &&
 990                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 991                                 c->radar_detect_widths) ||
 992                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
 993                                 c->radar_detect_regions)))
 994                         goto nla_put_failure;
 995
 996                 nla_nest_end(msg, nl_combi);
 997         }
 998
 999         nla_nest_end(msg, nl_combis);
1000
1001         return 0;
1002 nla_put_failure:
1003         return -ENOBUFS;
1004 }
1005
1006 #ifdef CONFIG_PM
1007 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1008                                         struct sk_buff *msg)
1009 {
1010         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1011         struct nlattr *nl_tcp;
1012
1013         if (!tcp)
1014                 return 0;
1015
1016         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1017         if (!nl_tcp)
1018                 return -ENOBUFS;
1019
1020         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1021                         tcp->data_payload_max))
1022                 return -ENOBUFS;
1023
1024         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1025                         tcp->data_payload_max))
1026                 return -ENOBUFS;
1027
1028         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1029                 return -ENOBUFS;
1030
1031         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1032                                 sizeof(*tcp->tok), tcp->tok))
1033                 return -ENOBUFS;
1034
1035         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1036                         tcp->data_interval_max))
1037                 return -ENOBUFS;
1038
1039         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1040                         tcp->wake_payload_max))
1041                 return -ENOBUFS;
1042
1043         nla_nest_end(msg, nl_tcp);
1044         return 0;
1045 }
1046
1047 static int nl80211_send_wowlan(struct sk_buff *msg,
1048                                struct cfg80211_registered_device *rdev,
1049                                bool large)
1050 {
1051         struct nlattr *nl_wowlan;
1052
1053         if (!rdev->wiphy.wowlan)
1054                 return 0;
1055
1056         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1057         if (!nl_wowlan)
1058                 return -ENOBUFS;
1059
1060         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1061              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1062             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1063              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1064             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1065              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1066             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1067              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1068             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1069              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1070             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1071              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1072             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1073              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1074             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1075              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1076                 return -ENOBUFS;
1077
1078         if (rdev->wiphy.wowlan->n_patterns) {
1079                 struct nl80211_pattern_support pat = {
1080                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1081                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1082                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1083                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1084                 };
1085
1086                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1087                             sizeof(pat), &pat))
1088                         return -ENOBUFS;
1089         }
1090
1091         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1092                 return -ENOBUFS;
1093
1094         /* TODO: send wowlan net detect */
1095
1096         nla_nest_end(msg, nl_wowlan);
1097
1098         return 0;
1099 }
1100 #endif
1101
1102 static int nl80211_send_coalesce(struct sk_buff *msg,
1103                                  struct cfg80211_registered_device *rdev)
1104 {
1105         struct nl80211_coalesce_rule_support rule;
1106
1107         if (!rdev->wiphy.coalesce)
1108                 return 0;
1109
1110         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1111         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1112         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1113         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1114         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1115         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1116
1117         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1118                 return -ENOBUFS;
1119
1120         return 0;
1121 }
1122
1123 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1124                                       struct ieee80211_supported_band *sband)
1125 {
1126         struct nlattr *nl_rates, *nl_rate;
1127         struct ieee80211_rate *rate;
1128         int i;
1129
1130         /* add HT info */
1131         if (sband->ht_cap.ht_supported &&
1132             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1133                      sizeof(sband->ht_cap.mcs),
1134                      &sband->ht_cap.mcs) ||
1135              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1136                          sband->ht_cap.cap) ||
1137              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1138                         sband->ht_cap.ampdu_factor) ||
1139              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1140                         sband->ht_cap.ampdu_density)))
1141                 return -ENOBUFS;
1142
1143         /* add VHT info */
1144         if (sband->vht_cap.vht_supported &&
1145             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1146                      sizeof(sband->vht_cap.vht_mcs),
1147                      &sband->vht_cap.vht_mcs) ||
1148              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1149                          sband->vht_cap.cap)))
1150                 return -ENOBUFS;
1151
1152         /* add bitrates */
1153         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1154         if (!nl_rates)
1155                 return -ENOBUFS;
1156
1157         for (i = 0; i < sband->n_bitrates; i++) {
1158                 nl_rate = nla_nest_start(msg, i);
1159                 if (!nl_rate)
1160                         return -ENOBUFS;
1161
1162                 rate = &sband->bitrates[i];
1163                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1164                                 rate->bitrate))
1165                         return -ENOBUFS;
1166                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1167                     nla_put_flag(msg,
1168                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1169                         return -ENOBUFS;
1170
1171                 nla_nest_end(msg, nl_rate);
1172         }
1173
1174         nla_nest_end(msg, nl_rates);
1175
1176         return 0;
1177 }
1178
1179 static int
1180 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1181                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1182 {
1183         u16 stypes;
1184         struct nlattr *nl_ftypes, *nl_ifs;
1185         enum nl80211_iftype ift;
1186         int i;
1187
1188         if (!mgmt_stypes)
1189                 return 0;
1190
1191         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1192         if (!nl_ifs)
1193                 return -ENOBUFS;
1194
1195         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1196                 nl_ftypes = nla_nest_start(msg, ift);
1197                 if (!nl_ftypes)
1198                         return -ENOBUFS;
1199                 i = 0;
1200                 stypes = mgmt_stypes[ift].tx;
1201                 while (stypes) {
1202                         if ((stypes & 1) &&
1203                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1204                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1205                                 return -ENOBUFS;
1206                         stypes >>= 1;
1207                         i++;
1208                 }
1209                 nla_nest_end(msg, nl_ftypes);
1210         }
1211
1212         nla_nest_end(msg, nl_ifs);
1213
1214         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1215         if (!nl_ifs)
1216                 return -ENOBUFS;
1217
1218         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1219                 nl_ftypes = nla_nest_start(msg, ift);
1220                 if (!nl_ftypes)
1221                         return -ENOBUFS;
1222                 i = 0;
1223                 stypes = mgmt_stypes[ift].rx;
1224                 while (stypes) {
1225                         if ((stypes & 1) &&
1226                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1227                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1228                                 return -ENOBUFS;
1229                         stypes >>= 1;
1230                         i++;
1231                 }
1232                 nla_nest_end(msg, nl_ftypes);
1233         }
1234         nla_nest_end(msg, nl_ifs);
1235
1236         return 0;
1237 }
1238
1239 struct nl80211_dump_wiphy_state {
1240         s64 filter_wiphy;
1241         long start;
1242         long split_start, band_start, chan_start;
1243         bool split;
1244 };
1245
1246 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1247                               enum nl80211_commands cmd,
1248                               struct sk_buff *msg, u32 portid, u32 seq,
1249                               int flags, struct nl80211_dump_wiphy_state *state)
1250 {
1251         void *hdr;
1252         struct nlattr *nl_bands, *nl_band;
1253         struct nlattr *nl_freqs, *nl_freq;
1254         struct nlattr *nl_cmds;
1255         enum ieee80211_band band;
1256         struct ieee80211_channel *chan;
1257         int i;
1258         const struct ieee80211_txrx_stypes *mgmt_stypes =
1259                                 rdev->wiphy.mgmt_stypes;
1260         u32 features;
1261
1262         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1263         if (!hdr)
1264                 return -ENOBUFS;
1265
1266         if (WARN_ON(!state))
1267                 return -EINVAL;
1268
1269         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1270             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1271                            wiphy_name(&rdev->wiphy)) ||
1272             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1273                         cfg80211_rdev_list_generation))
1274                 goto nla_put_failure;
1275
1276         if (cmd != NL80211_CMD_NEW_WIPHY)
1277                 goto finish;
1278
1279         switch (state->split_start) {
1280         case 0:
1281                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1282                                rdev->wiphy.retry_short) ||
1283                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1284                                rdev->wiphy.retry_long) ||
1285                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1286                                 rdev->wiphy.frag_threshold) ||
1287                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1288                                 rdev->wiphy.rts_threshold) ||
1289                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1290                                rdev->wiphy.coverage_class) ||
1291                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1292                                rdev->wiphy.max_scan_ssids) ||
1293                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1294                                rdev->wiphy.max_sched_scan_ssids) ||
1295                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1296                                 rdev->wiphy.max_scan_ie_len) ||
1297                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1298                                 rdev->wiphy.max_sched_scan_ie_len) ||
1299                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1300                                rdev->wiphy.max_match_sets))
1301                         goto nla_put_failure;
1302
1303                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1304                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1305                         goto nla_put_failure;
1306                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1307                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1308                         goto nla_put_failure;
1309                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1310                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1311                         goto nla_put_failure;
1312                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1313                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1314                         goto nla_put_failure;
1315                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1316                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1317                         goto nla_put_failure;
1318                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1319                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1320                         goto nla_put_failure;
1321                 state->split_start++;
1322                 if (state->split)
1323                         break;
1324         case 1:
1325                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1326                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1327                             rdev->wiphy.cipher_suites))
1328                         goto nla_put_failure;
1329
1330                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1331                                rdev->wiphy.max_num_pmkids))
1332                         goto nla_put_failure;
1333
1334                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1335                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1336                         goto nla_put_failure;
1337
1338                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1339                                 rdev->wiphy.available_antennas_tx) ||
1340                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1341                                 rdev->wiphy.available_antennas_rx))
1342                         goto nla_put_failure;
1343
1344                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1345                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1346                                 rdev->wiphy.probe_resp_offload))
1347                         goto nla_put_failure;
1348
1349                 if ((rdev->wiphy.available_antennas_tx ||
1350                      rdev->wiphy.available_antennas_rx) &&
1351                     rdev->ops->get_antenna) {
1352                         u32 tx_ant = 0, rx_ant = 0;
1353                         int res;
1354                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1355                         if (!res) {
1356                                 if (nla_put_u32(msg,
1357                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1358                                                 tx_ant) ||
1359                                     nla_put_u32(msg,
1360                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1361                                                 rx_ant))
1362                                         goto nla_put_failure;
1363                         }
1364                 }
1365
1366                 state->split_start++;
1367                 if (state->split)
1368                         break;
1369         case 2:
1370                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1371                                         rdev->wiphy.interface_modes))
1372                                 goto nla_put_failure;
1373                 state->split_start++;
1374                 if (state->split)
1375                         break;
1376         case 3:
1377                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1378                 if (!nl_bands)
1379                         goto nla_put_failure;
1380
1381                 for (band = state->band_start;
1382                      band < IEEE80211_NUM_BANDS; band++) {
1383                         struct ieee80211_supported_band *sband;
1384
1385                         sband = rdev->wiphy.bands[band];
1386
1387                         if (!sband)
1388                                 continue;
1389
1390                         nl_band = nla_nest_start(msg, band);
1391                         if (!nl_band)
1392                                 goto nla_put_failure;
1393
1394                         switch (state->chan_start) {
1395                         case 0:
1396                                 if (nl80211_send_band_rateinfo(msg, sband))
1397                                         goto nla_put_failure;
1398                                 state->chan_start++;
1399                                 if (state->split)
1400                                         break;
1401                         default:
1402                                 /* add frequencies */
1403                                 nl_freqs = nla_nest_start(
1404                                         msg, NL80211_BAND_ATTR_FREQS);
1405                                 if (!nl_freqs)
1406                                         goto nla_put_failure;
1407
1408                                 for (i = state->chan_start - 1;
1409                                      i < sband->n_channels;
1410                                      i++) {
1411                                         nl_freq = nla_nest_start(msg, i);
1412                                         if (!nl_freq)
1413                                                 goto nla_put_failure;
1414
1415                                         chan = &sband->channels[i];
1416
1417                                         if (nl80211_msg_put_channel(
1418                                                         msg, chan,
1419                                                         state->split))
1420                                                 goto nla_put_failure;
1421
1422                                         nla_nest_end(msg, nl_freq);
1423                                         if (state->split)
1424                                                 break;
1425                                 }
1426                                 if (i < sband->n_channels)
1427                                         state->chan_start = i + 2;
1428                                 else
1429                                         state->chan_start = 0;
1430                                 nla_nest_end(msg, nl_freqs);
1431                         }
1432
1433                         nla_nest_end(msg, nl_band);
1434
1435                         if (state->split) {
1436                                 /* start again here */
1437                                 if (state->chan_start)
1438                                         band--;
1439                                 break;
1440                         }
1441                 }
1442                 nla_nest_end(msg, nl_bands);
1443
1444                 if (band < IEEE80211_NUM_BANDS)
1445                         state->band_start = band + 1;
1446                 else
1447                         state->band_start = 0;
1448
1449                 /* if bands & channels are done, continue outside */
1450                 if (state->band_start == 0 && state->chan_start == 0)
1451                         state->split_start++;
1452                 if (state->split)
1453                         break;
1454         case 4:
1455                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1456                 if (!nl_cmds)
1457                         goto nla_put_failure;
1458
1459                 i = 0;
1460 #define CMD(op, n)                                                      \
1461                  do {                                                   \
1462                         if (rdev->ops->op) {                            \
1463                                 i++;                                    \
1464                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1465                                         goto nla_put_failure;           \
1466                         }                                               \
1467                 } while (0)
1468
1469                 CMD(add_virtual_intf, NEW_INTERFACE);
1470                 CMD(change_virtual_intf, SET_INTERFACE);
1471                 CMD(add_key, NEW_KEY);
1472                 CMD(start_ap, START_AP);
1473                 CMD(add_station, NEW_STATION);
1474                 CMD(add_mpath, NEW_MPATH);
1475                 CMD(update_mesh_config, SET_MESH_CONFIG);
1476                 CMD(change_bss, SET_BSS);
1477                 CMD(auth, AUTHENTICATE);
1478                 CMD(assoc, ASSOCIATE);
1479                 CMD(deauth, DEAUTHENTICATE);
1480                 CMD(disassoc, DISASSOCIATE);
1481                 CMD(join_ibss, JOIN_IBSS);
1482                 CMD(join_mesh, JOIN_MESH);
1483                 CMD(set_pmksa, SET_PMKSA);
1484                 CMD(del_pmksa, DEL_PMKSA);
1485                 CMD(flush_pmksa, FLUSH_PMKSA);
1486                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1487                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1488                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1489                 CMD(mgmt_tx, FRAME);
1490                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1491                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1492                         i++;
1493                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1494                                 goto nla_put_failure;
1495                 }
1496                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1497                     rdev->ops->join_mesh) {
1498                         i++;
1499                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1500                                 goto nla_put_failure;
1501                 }
1502                 CMD(set_wds_peer, SET_WDS_PEER);
1503                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1504                         CMD(tdls_mgmt, TDLS_MGMT);
1505                         CMD(tdls_oper, TDLS_OPER);
1506                 }
1507                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1508                         CMD(sched_scan_start, START_SCHED_SCAN);
1509                 CMD(probe_client, PROBE_CLIENT);
1510                 CMD(set_noack_map, SET_NOACK_MAP);
1511                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1512                         i++;
1513                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1514                                 goto nla_put_failure;
1515                 }
1516                 CMD(start_p2p_device, START_P2P_DEVICE);
1517                 CMD(set_mcast_rate, SET_MCAST_RATE);
1518 #ifdef CONFIG_NL80211_TESTMODE
1519                 CMD(testmode_cmd, TESTMODE);
1520 #endif
1521                 if (state->split) {
1522                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1523                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1524                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1525                                 CMD(channel_switch, CHANNEL_SWITCH);
1526                         CMD(set_qos_map, SET_QOS_MAP);
1527                         if (rdev->wiphy.features &
1528                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1529                                 CMD(add_tx_ts, ADD_TX_TS);
1530                 }
1531                 /* add into the if now */
1532 #undef CMD
1533
1534                 if (rdev->ops->connect || rdev->ops->auth) {
1535                         i++;
1536                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1537                                 goto nla_put_failure;
1538                 }
1539
1540                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1541                         i++;
1542                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1543                                 goto nla_put_failure;
1544                 }
1545
1546                 nla_nest_end(msg, nl_cmds);
1547                 state->split_start++;
1548                 if (state->split)
1549                         break;
1550         case 5:
1551                 if (rdev->ops->remain_on_channel &&
1552                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1553                     nla_put_u32(msg,
1554                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1555                                 rdev->wiphy.max_remain_on_channel_duration))
1556                         goto nla_put_failure;
1557
1558                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1559                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1560                         goto nla_put_failure;
1561
1562                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1563                         goto nla_put_failure;
1564                 state->split_start++;
1565                 if (state->split)
1566                         break;
1567         case 6:
1568 #ifdef CONFIG_PM
1569                 if (nl80211_send_wowlan(msg, rdev, state->split))
1570                         goto nla_put_failure;
1571                 state->split_start++;
1572                 if (state->split)
1573                         break;
1574 #else
1575                 state->split_start++;
1576 #endif
1577         case 7:
1578                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1579                                         rdev->wiphy.software_iftypes))
1580                         goto nla_put_failure;
1581
1582                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1583                                                    state->split))
1584                         goto nla_put_failure;
1585
1586                 state->split_start++;
1587                 if (state->split)
1588                         break;
1589         case 8:
1590                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1591                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1592                                 rdev->wiphy.ap_sme_capa))
1593                         goto nla_put_failure;
1594
1595                 features = rdev->wiphy.features;
1596                 /*
1597                  * We can only add the per-channel limit information if the
1598                  * dump is split, otherwise it makes it too big. Therefore
1599                  * only advertise it in that case.
1600                  */
1601                 if (state->split)
1602                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1603                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1604                         goto nla_put_failure;
1605
1606                 if (rdev->wiphy.ht_capa_mod_mask &&
1607                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1608                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1609                             rdev->wiphy.ht_capa_mod_mask))
1610                         goto nla_put_failure;
1611
1612                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1613                     rdev->wiphy.max_acl_mac_addrs &&
1614                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1615                                 rdev->wiphy.max_acl_mac_addrs))
1616                         goto nla_put_failure;
1617
1618                 /*
1619                  * Any information below this point is only available to
1620                  * applications that can deal with it being split. This
1621                  * helps ensure that newly added capabilities don't break
1622                  * older tools by overrunning their buffers.
1623                  *
1624                  * We still increment split_start so that in the split
1625                  * case we'll continue with more data in the next round,
1626                  * but break unconditionally so unsplit data stops here.
1627                  */
1628                 state->split_start++;
1629                 break;
1630         case 9:
1631                 if (rdev->wiphy.extended_capabilities &&
1632                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1633                              rdev->wiphy.extended_capabilities_len,
1634                              rdev->wiphy.extended_capabilities) ||
1635                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1636                              rdev->wiphy.extended_capabilities_len,
1637                              rdev->wiphy.extended_capabilities_mask)))
1638                         goto nla_put_failure;
1639
1640                 if (rdev->wiphy.vht_capa_mod_mask &&
1641                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1642                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1643                             rdev->wiphy.vht_capa_mod_mask))
1644                         goto nla_put_failure;
1645
1646                 state->split_start++;
1647                 break;
1648         case 10:
1649                 if (nl80211_send_coalesce(msg, rdev))
1650                         goto nla_put_failure;
1651
1652                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1653                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1654                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1655                         goto nla_put_failure;
1656
1657                 if (rdev->wiphy.max_ap_assoc_sta &&
1658                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1659                                 rdev->wiphy.max_ap_assoc_sta))
1660                         goto nla_put_failure;
1661
1662                 state->split_start++;
1663                 break;
1664         case 11:
1665                 if (rdev->wiphy.n_vendor_commands) {
1666                         const struct nl80211_vendor_cmd_info *info;
1667                         struct nlattr *nested;
1668
1669                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1670                         if (!nested)
1671                                 goto nla_put_failure;
1672
1673                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1674                                 info = &rdev->wiphy.vendor_commands[i].info;
1675                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1676                                         goto nla_put_failure;
1677                         }
1678                         nla_nest_end(msg, nested);
1679                 }
1680
1681                 if (rdev->wiphy.n_vendor_events) {
1682                         const struct nl80211_vendor_cmd_info *info;
1683                         struct nlattr *nested;
1684
1685                         nested = nla_nest_start(msg,
1686                                                 NL80211_ATTR_VENDOR_EVENTS);
1687                         if (!nested)
1688                                 goto nla_put_failure;
1689
1690                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1691                                 info = &rdev->wiphy.vendor_events[i];
1692                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1693                                         goto nla_put_failure;
1694                         }
1695                         nla_nest_end(msg, nested);
1696                 }
1697                 state->split_start++;
1698                 break;
1699         case 12:
1700                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1701                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1702                                rdev->wiphy.max_num_csa_counters))
1703                         goto nla_put_failure;
1704
1705                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1706                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1707                         goto nla_put_failure;
1708
1709                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1710                             sizeof(rdev->wiphy.ext_features),
1711                             rdev->wiphy.ext_features))
1712                         goto nla_put_failure;
1713
1714                 /* done */
1715                 state->split_start = 0;
1716                 break;
1717         }
1718  finish:
1719         return genlmsg_end(msg, hdr);
1720
1721  nla_put_failure:
1722         genlmsg_cancel(msg, hdr);
1723         return -EMSGSIZE;
1724 }
1725
1726 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1727                                     struct netlink_callback *cb,
1728                                     struct nl80211_dump_wiphy_state *state)
1729 {
1730         struct nlattr **tb = nl80211_fam.attrbuf;
1731         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1732                               tb, nl80211_fam.maxattr, nl80211_policy);
1733         /* ignore parse errors for backward compatibility */
1734         if (ret)
1735                 return 0;
1736
1737         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1738         if (tb[NL80211_ATTR_WIPHY])
1739                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1740         if (tb[NL80211_ATTR_WDEV])
1741                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1742         if (tb[NL80211_ATTR_IFINDEX]) {
1743                 struct net_device *netdev;
1744                 struct cfg80211_registered_device *rdev;
1745                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1746
1747                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1748                 if (!netdev)
1749                         return -ENODEV;
1750                 if (netdev->ieee80211_ptr) {
1751                         rdev = wiphy_to_rdev(
1752                                 netdev->ieee80211_ptr->wiphy);
1753                         state->filter_wiphy = rdev->wiphy_idx;
1754                 }
1755         }
1756
1757         return 0;
1758 }
1759
1760 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1761 {
1762         int idx = 0, ret;
1763         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1764         struct cfg80211_registered_device *rdev;
1765
1766         rtnl_lock();
1767         if (!state) {
1768                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1769                 if (!state) {
1770                         rtnl_unlock();
1771                         return -ENOMEM;
1772                 }
1773                 state->filter_wiphy = -1;
1774                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1775                 if (ret) {
1776                         kfree(state);
1777                         rtnl_unlock();
1778                         return ret;
1779                 }
1780                 cb->args[0] = (long)state;
1781         }
1782
1783         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1784                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1785                         continue;
1786                 if (++idx <= state->start)
1787                         continue;
1788                 if (state->filter_wiphy != -1 &&
1789                     state->filter_wiphy != rdev->wiphy_idx)
1790                         continue;
1791                 /* attempt to fit multiple wiphy data chunks into the skb */
1792                 do {
1793                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1794                                                  skb,
1795                                                  NETLINK_CB(cb->skb).portid,
1796                                                  cb->nlh->nlmsg_seq,
1797                                                  NLM_F_MULTI, state);
1798                         if (ret < 0) {
1799                                 /*
1800                                  * If sending the wiphy data didn't fit (ENOBUFS
1801                                  * or EMSGSIZE returned), this SKB is still
1802                                  * empty (so it's not too big because another
1803                                  * wiphy dataset is already in the skb) and
1804                                  * we've not tried to adjust the dump allocation
1805                                  * yet ... then adjust the alloc size to be
1806                                  * bigger, and return 1 but with the empty skb.
1807                                  * This results in an empty message being RX'ed
1808                                  * in userspace, but that is ignored.
1809                                  *
1810                                  * We can then retry with the larger buffer.
1811                                  */
1812                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1813                                     !skb->len && !state->split &&
1814                                     cb->min_dump_alloc < 4096) {
1815                                         cb->min_dump_alloc = 4096;
1816                                         state->split_start = 0;
1817                                         rtnl_unlock();
1818                                         return 1;
1819                                 }
1820                                 idx--;
1821                                 break;
1822                         }
1823                 } while (state->split_start > 0);
1824                 break;
1825         }
1826         rtnl_unlock();
1827
1828         state->start = idx;
1829
1830         return skb->len;
1831 }
1832
1833 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1834 {
1835         kfree((void *)cb->args[0]);
1836         return 0;
1837 }
1838
1839 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1840 {
1841         struct sk_buff *msg;
1842         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1843         struct nl80211_dump_wiphy_state state = {};
1844
1845         msg = nlmsg_new(4096, GFP_KERNEL);
1846         if (!msg)
1847                 return -ENOMEM;
1848
1849         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1850                                info->snd_portid, info->snd_seq, 0,
1851                                &state) < 0) {
1852                 nlmsg_free(msg);
1853                 return -ENOBUFS;
1854         }
1855
1856         return genlmsg_reply(msg, info);
1857 }
1858
1859 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1860         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1861         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1862         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1863         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1864         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1865 };
1866
1867 static int parse_txq_params(struct nlattr *tb[],
1868                             struct ieee80211_txq_params *txq_params)
1869 {
1870         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1871             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1872             !tb[NL80211_TXQ_ATTR_AIFS])
1873                 return -EINVAL;
1874
1875         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1876         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1877         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1878         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1879         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1880
1881         if (txq_params->ac >= NL80211_NUM_ACS)
1882                 return -EINVAL;
1883
1884         return 0;
1885 }
1886
1887 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1888 {
1889         /*
1890          * You can only set the channel explicitly for WDS interfaces,
1891          * all others have their channel managed via their respective
1892          * "establish a connection" command (connect, join, ...)
1893          *
1894          * For AP/GO and mesh mode, the channel can be set with the
1895          * channel userspace API, but is only stored and passed to the
1896          * low-level driver when the AP starts or the mesh is joined.
1897          * This is for backward compatibility, userspace can also give
1898          * the channel in the start-ap or join-mesh commands instead.
1899          *
1900          * Monitors are special as they are normally slaved to
1901          * whatever else is going on, so they have their own special
1902          * operation to set the monitor channel if possible.
1903          */
1904         return !wdev ||
1905                 wdev->iftype == NL80211_IFTYPE_AP ||
1906                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1907                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1908                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1909 }
1910
1911 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1912                                  struct genl_info *info,
1913                                  struct cfg80211_chan_def *chandef)
1914 {
1915         u32 control_freq;
1916
1917         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1918                 return -EINVAL;
1919
1920         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1921
1922         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1923         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1924         chandef->center_freq1 = control_freq;
1925         chandef->center_freq2 = 0;
1926
1927         /* Primary channel not allowed */
1928         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1929                 return -EINVAL;
1930
1931         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1932                 enum nl80211_channel_type chantype;
1933
1934                 chantype = nla_get_u32(
1935                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1936
1937                 switch (chantype) {
1938                 case NL80211_CHAN_NO_HT:
1939                 case NL80211_CHAN_HT20:
1940                 case NL80211_CHAN_HT40PLUS:
1941                 case NL80211_CHAN_HT40MINUS:
1942                         cfg80211_chandef_create(chandef, chandef->chan,
1943                                                 chantype);
1944                         break;
1945                 default:
1946                         return -EINVAL;
1947                 }
1948         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1949                 chandef->width =
1950                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1951                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1952                         chandef->center_freq1 =
1953                                 nla_get_u32(
1954                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1955                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1956                         chandef->center_freq2 =
1957                                 nla_get_u32(
1958                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1959         }
1960
1961         if (!cfg80211_chandef_valid(chandef))
1962                 return -EINVAL;
1963
1964         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1965                                      IEEE80211_CHAN_DISABLED))
1966                 return -EINVAL;
1967
1968         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1969              chandef->width == NL80211_CHAN_WIDTH_10) &&
1970             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1971                 return -EINVAL;
1972
1973         return 0;
1974 }
1975
1976 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1977                                  struct net_device *dev,
1978                                  struct genl_info *info)
1979 {
1980         struct cfg80211_chan_def chandef;
1981         int result;
1982         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1983         struct wireless_dev *wdev = NULL;
1984
1985         if (dev)
1986                 wdev = dev->ieee80211_ptr;
1987         if (!nl80211_can_set_dev_channel(wdev))
1988                 return -EOPNOTSUPP;
1989         if (wdev)
1990                 iftype = wdev->iftype;
1991
1992         result = nl80211_parse_chandef(rdev, info, &chandef);
1993         if (result)
1994                 return result;
1995
1996         switch (iftype) {
1997         case NL80211_IFTYPE_AP:
1998         case NL80211_IFTYPE_P2P_GO:
1999                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef, iftype)) {
2000                         result = -EINVAL;
2001                         break;
2002                 }
2003                 if (wdev->beacon_interval) {
2004                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2005                             !(rdev->wiphy.features &
2006                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2007                                 result = -EBUSY;
2008                                 break;
2009                         }
2010
2011                         /* Only allow dynamic channel width changes */
2012                         if (chandef.chan != wdev->preset_chandef.chan) {
2013                                 result = -EBUSY;
2014                                 break;
2015                         }
2016                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2017                         if (result)
2018                                 break;
2019                 }
2020                 wdev->preset_chandef = chandef;
2021                 result = 0;
2022                 break;
2023         case NL80211_IFTYPE_MESH_POINT:
2024                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2025                 break;
2026         case NL80211_IFTYPE_MONITOR:
2027                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2028                 break;
2029         default:
2030                 result = -EINVAL;
2031         }
2032
2033         return result;
2034 }
2035
2036 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2037 {
2038         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2039         struct net_device *netdev = info->user_ptr[1];
2040
2041         return __nl80211_set_channel(rdev, netdev, info);
2042 }
2043
2044 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2045 {
2046         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2047         struct net_device *dev = info->user_ptr[1];
2048         struct wireless_dev *wdev = dev->ieee80211_ptr;
2049         const u8 *bssid;
2050
2051         if (!info->attrs[NL80211_ATTR_MAC])
2052                 return -EINVAL;
2053
2054         if (netif_running(dev))
2055                 return -EBUSY;
2056
2057         if (!rdev->ops->set_wds_peer)
2058                 return -EOPNOTSUPP;
2059
2060         if (wdev->iftype != NL80211_IFTYPE_WDS)
2061                 return -EOPNOTSUPP;
2062
2063         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2064         return rdev_set_wds_peer(rdev, dev, bssid);
2065 }
2066
2067
2068 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2069 {
2070         struct cfg80211_registered_device *rdev;
2071         struct net_device *netdev = NULL;
2072         struct wireless_dev *wdev;
2073         int result = 0, rem_txq_params = 0;
2074         struct nlattr *nl_txq_params;
2075         u32 changed;
2076         u8 retry_short = 0, retry_long = 0;
2077         u32 frag_threshold = 0, rts_threshold = 0;
2078         u8 coverage_class = 0;
2079
2080         ASSERT_RTNL();
2081
2082         /*
2083          * Try to find the wiphy and netdev. Normally this
2084          * function shouldn't need the netdev, but this is
2085          * done for backward compatibility -- previously
2086          * setting the channel was done per wiphy, but now
2087          * it is per netdev. Previous userland like hostapd
2088          * also passed a netdev to set_wiphy, so that it is
2089          * possible to let that go to the right netdev!
2090          */
2091
2092         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2093                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2094
2095                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2096                 if (netdev && netdev->ieee80211_ptr)
2097                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2098                 else
2099                         netdev = NULL;
2100         }
2101
2102         if (!netdev) {
2103                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2104                                                   info->attrs);
2105                 if (IS_ERR(rdev))
2106                         return PTR_ERR(rdev);
2107                 wdev = NULL;
2108                 netdev = NULL;
2109                 result = 0;
2110         } else
2111                 wdev = netdev->ieee80211_ptr;
2112
2113         /*
2114          * end workaround code, by now the rdev is available
2115          * and locked, and wdev may or may not be NULL.
2116          */
2117
2118         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2119                 result = cfg80211_dev_rename(
2120                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2121
2122         if (result)
2123                 return result;
2124
2125         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2126                 struct ieee80211_txq_params txq_params;
2127                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2128
2129                 if (!rdev->ops->set_txq_params)
2130                         return -EOPNOTSUPP;
2131
2132                 if (!netdev)
2133                         return -EINVAL;
2134
2135                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2136                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2137                         return -EINVAL;
2138
2139                 if (!netif_running(netdev))
2140                         return -ENETDOWN;
2141
2142                 nla_for_each_nested(nl_txq_params,
2143                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2144                                     rem_txq_params) {
2145                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2146                                            nla_data(nl_txq_params),
2147                                            nla_len(nl_txq_params),
2148                                            txq_params_policy);
2149                         if (result)
2150                                 return result;
2151                         result = parse_txq_params(tb, &txq_params);
2152                         if (result)
2153                                 return result;
2154
2155                         result = rdev_set_txq_params(rdev, netdev,
2156                                                      &txq_params);
2157                         if (result)
2158                                 return result;
2159                 }
2160         }
2161
2162         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2163                 result = __nl80211_set_channel(
2164                         rdev,
2165                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2166                         info);
2167                 if (result)
2168                         return result;
2169         }
2170
2171         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2172                 struct wireless_dev *txp_wdev = wdev;
2173                 enum nl80211_tx_power_setting type;
2174                 int idx, mbm = 0;
2175
2176                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2177                         txp_wdev = NULL;
2178
2179                 if (!rdev->ops->set_tx_power)
2180                         return -EOPNOTSUPP;
2181
2182                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2183                 type = nla_get_u32(info->attrs[idx]);
2184
2185                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2186                     (type != NL80211_TX_POWER_AUTOMATIC))
2187                         return -EINVAL;
2188
2189                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2190                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2191                         mbm = nla_get_u32(info->attrs[idx]);
2192                 }
2193
2194                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2195                 if (result)
2196                         return result;
2197         }
2198
2199         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2200             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2201                 u32 tx_ant, rx_ant;
2202                 if ((!rdev->wiphy.available_antennas_tx &&
2203                      !rdev->wiphy.available_antennas_rx) ||
2204                     !rdev->ops->set_antenna)
2205                         return -EOPNOTSUPP;
2206
2207                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2208                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2209
2210                 /* reject antenna configurations which don't match the
2211                  * available antenna masks, except for the "all" mask */
2212                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2213                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2214                         return -EINVAL;
2215
2216                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2217                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2218
2219                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2220                 if (result)
2221                         return result;
2222         }
2223
2224         changed = 0;
2225
2226         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2227                 retry_short = nla_get_u8(
2228                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2229                 if (retry_short == 0)
2230                         return -EINVAL;
2231
2232                 changed |= WIPHY_PARAM_RETRY_SHORT;
2233         }
2234
2235         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2236                 retry_long = nla_get_u8(
2237                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2238                 if (retry_long == 0)
2239                         return -EINVAL;
2240
2241                 changed |= WIPHY_PARAM_RETRY_LONG;
2242         }
2243
2244         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2245                 frag_threshold = nla_get_u32(
2246                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2247                 if (frag_threshold < 256)
2248                         return -EINVAL;
2249
2250                 if (frag_threshold != (u32) -1) {
2251                         /*
2252                          * Fragments (apart from the last one) are required to
2253                          * have even length. Make the fragmentation code
2254                          * simpler by stripping LSB should someone try to use
2255                          * odd threshold value.
2256                          */
2257                         frag_threshold &= ~0x1;
2258                 }
2259                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2260         }
2261
2262         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2263                 rts_threshold = nla_get_u32(
2264                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2265                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2266         }
2267
2268         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2269                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2270                         return -EINVAL;
2271
2272                 coverage_class = nla_get_u8(
2273                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2274                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2275         }
2276
2277         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2278                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2279                         return -EOPNOTSUPP;
2280
2281                 changed |= WIPHY_PARAM_DYN_ACK;
2282         }
2283
2284         if (changed) {
2285                 u8 old_retry_short, old_retry_long;
2286                 u32 old_frag_threshold, old_rts_threshold;
2287                 u8 old_coverage_class;
2288
2289                 if (!rdev->ops->set_wiphy_params)
2290                         return -EOPNOTSUPP;
2291
2292                 old_retry_short = rdev->wiphy.retry_short;
2293                 old_retry_long = rdev->wiphy.retry_long;
2294                 old_frag_threshold = rdev->wiphy.frag_threshold;
2295                 old_rts_threshold = rdev->wiphy.rts_threshold;
2296                 old_coverage_class = rdev->wiphy.coverage_class;
2297
2298                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2299                         rdev->wiphy.retry_short = retry_short;
2300                 if (changed & WIPHY_PARAM_RETRY_LONG)
2301                         rdev->wiphy.retry_long = retry_long;
2302                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2303                         rdev->wiphy.frag_threshold = frag_threshold;
2304                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2305                         rdev->wiphy.rts_threshold = rts_threshold;
2306                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2307                         rdev->wiphy.coverage_class = coverage_class;
2308
2309                 result = rdev_set_wiphy_params(rdev, changed);
2310                 if (result) {
2311                         rdev->wiphy.retry_short = old_retry_short;
2312                         rdev->wiphy.retry_long = old_retry_long;
2313                         rdev->wiphy.frag_threshold = old_frag_threshold;
2314                         rdev->wiphy.rts_threshold = old_rts_threshold;
2315                         rdev->wiphy.coverage_class = old_coverage_class;
2316                 }
2317         }
2318         return 0;
2319 }
2320
2321 static inline u64 wdev_id(struct wireless_dev *wdev)
2322 {
2323         return (u64)wdev->identifier |
2324                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2325 }
2326
2327 static int nl80211_send_chandef(struct sk_buff *msg,
2328                                 const struct cfg80211_chan_def *chandef)
2329 {
2330         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2331                 return -EINVAL;
2332
2333         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2334                         chandef->chan->center_freq))
2335                 return -ENOBUFS;
2336         switch (chandef->width) {
2337         case NL80211_CHAN_WIDTH_20_NOHT:
2338         case NL80211_CHAN_WIDTH_20:
2339         case NL80211_CHAN_WIDTH_40:
2340                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2341                                 cfg80211_get_chandef_type(chandef)))
2342                         return -ENOBUFS;
2343                 break;
2344         default:
2345                 break;
2346         }
2347         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2348                 return -ENOBUFS;
2349         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2350                 return -ENOBUFS;
2351         if (chandef->center_freq2 &&
2352             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2353                 return -ENOBUFS;
2354         return 0;
2355 }
2356
2357 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2358                               struct cfg80211_registered_device *rdev,
2359                               struct wireless_dev *wdev, bool removal)
2360 {
2361         struct net_device *dev = wdev->netdev;
2362         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2363         void *hdr;
2364
2365         if (removal)
2366                 cmd = NL80211_CMD_DEL_INTERFACE;
2367
2368         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2369         if (!hdr)
2370                 return -1;
2371
2372         if (dev &&
2373             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2374              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2375                 goto nla_put_failure;
2376
2377         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2378             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2379             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2380             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2381             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2382                         rdev->devlist_generation ^
2383                         (cfg80211_rdev_list_generation << 2)))
2384                 goto nla_put_failure;
2385
2386         if (rdev->ops->get_channel) {
2387                 int ret;
2388                 struct cfg80211_chan_def chandef;
2389
2390                 ret = rdev_get_channel(rdev, wdev, &chandef);
2391                 if (ret == 0) {
2392                         if (nl80211_send_chandef(msg, &chandef))
2393                                 goto nla_put_failure;
2394                 }
2395         }
2396
2397         if (wdev->ssid_len) {
2398                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2399                         goto nla_put_failure;
2400         }
2401
2402         return genlmsg_end(msg, hdr);
2403
2404  nla_put_failure:
2405         genlmsg_cancel(msg, hdr);
2406         return -EMSGSIZE;
2407 }
2408
2409 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2410 {
2411         int wp_idx = 0;
2412         int if_idx = 0;
2413         int wp_start = cb->args[0];
2414         int if_start = cb->args[1];
2415         struct cfg80211_registered_device *rdev;
2416         struct wireless_dev *wdev;
2417
2418         rtnl_lock();
2419         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2420                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2421                         continue;
2422                 if (wp_idx < wp_start) {
2423                         wp_idx++;
2424                         continue;
2425                 }
2426                 if_idx = 0;
2427
2428                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2429                         if (if_idx < if_start) {
2430                                 if_idx++;
2431                                 continue;
2432                         }
2433                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2434                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2435                                                rdev, wdev, false) < 0) {
2436                                 goto out;
2437                         }
2438                         if_idx++;
2439                 }
2440
2441                 wp_idx++;
2442         }
2443  out:
2444         rtnl_unlock();
2445
2446         cb->args[0] = wp_idx;
2447         cb->args[1] = if_idx;
2448
2449         return skb->len;
2450 }
2451
2452 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2453 {
2454         struct sk_buff *msg;
2455         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2456         struct wireless_dev *wdev = info->user_ptr[1];
2457
2458         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2459         if (!msg)
2460                 return -ENOMEM;
2461
2462         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2463                                rdev, wdev, false) < 0) {
2464                 nlmsg_free(msg);
2465                 return -ENOBUFS;
2466         }
2467
2468         return genlmsg_reply(msg, info);
2469 }
2470
2471 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2472         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2473         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2474         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2475         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2476         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2477         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2478 };
2479
2480 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2481 {
2482         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2483         int flag;
2484
2485         *mntrflags = 0;
2486
2487         if (!nla)
2488                 return -EINVAL;
2489
2490         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2491                              nla, mntr_flags_policy))
2492                 return -EINVAL;
2493
2494         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2495                 if (flags[flag])
2496                         *mntrflags |= (1<<flag);
2497
2498         return 0;
2499 }
2500
2501 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2502                                struct net_device *netdev, u8 use_4addr,
2503                                enum nl80211_iftype iftype)
2504 {
2505         if (!use_4addr) {
2506                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2507                         return -EBUSY;
2508                 return 0;
2509         }
2510
2511         switch (iftype) {
2512         case NL80211_IFTYPE_AP_VLAN:
2513                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2514                         return 0;
2515                 break;
2516         case NL80211_IFTYPE_STATION:
2517                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2518                         return 0;
2519                 break;
2520         default:
2521                 break;
2522         }
2523
2524         return -EOPNOTSUPP;
2525 }
2526
2527 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2528 {
2529         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2530         struct vif_params params;
2531         int err;
2532         enum nl80211_iftype otype, ntype;
2533         struct net_device *dev = info->user_ptr[1];
2534         u32 _flags, *flags = NULL;
2535         bool change = false;
2536
2537         memset(&params, 0, sizeof(params));
2538
2539         otype = ntype = dev->ieee80211_ptr->iftype;
2540
2541         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2542                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2543                 if (otype != ntype)
2544                         change = true;
2545                 if (ntype > NL80211_IFTYPE_MAX)
2546                         return -EINVAL;
2547         }
2548
2549         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2550                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2551
2552                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2553                         return -EINVAL;
2554                 if (netif_running(dev))
2555                         return -EBUSY;
2556
2557                 wdev_lock(wdev);
2558                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2559                              IEEE80211_MAX_MESH_ID_LEN);
2560                 wdev->mesh_id_up_len =
2561                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2562                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2563                        wdev->mesh_id_up_len);
2564                 wdev_unlock(wdev);
2565         }
2566
2567         if (info->attrs[NL80211_ATTR_4ADDR]) {
2568                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2569                 change = true;
2570                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2571                 if (err)
2572                         return err;
2573         } else {
2574                 params.use_4addr = -1;
2575         }
2576
2577         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2578                 if (ntype != NL80211_IFTYPE_MONITOR)
2579                         return -EINVAL;
2580                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2581                                           &_flags);
2582                 if (err)
2583                         return err;
2584
2585                 flags = &_flags;
2586                 change = true;
2587         }
2588
2589         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2590             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2591                 return -EOPNOTSUPP;
2592
2593         if (change)
2594                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2595         else
2596                 err = 0;
2597
2598         if (!err && params.use_4addr != -1)
2599                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2600
2601         return err;
2602 }
2603
2604 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2605 {
2606         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2607         struct vif_params params;
2608         struct wireless_dev *wdev;
2609         struct sk_buff *msg, *event;
2610         int err;
2611         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2612         u32 flags;
2613
2614         /* to avoid failing a new interface creation due to pending removal */
2615         cfg80211_destroy_ifaces(rdev);
2616
2617         memset(&params, 0, sizeof(params));
2618
2619         if (!info->attrs[NL80211_ATTR_IFNAME])
2620                 return -EINVAL;
2621
2622         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2623                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2624                 if (type > NL80211_IFTYPE_MAX)
2625                         return -EINVAL;
2626         }
2627
2628         if (!rdev->ops->add_virtual_intf ||
2629             !(rdev->wiphy.interface_modes & (1 << type)))
2630                 return -EOPNOTSUPP;
2631
2632         if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2633              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2634             info->attrs[NL80211_ATTR_MAC]) {
2635                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2636                            ETH_ALEN);
2637                 if (!is_valid_ether_addr(params.macaddr))
2638                         return -EADDRNOTAVAIL;
2639         }
2640
2641         if (info->attrs[NL80211_ATTR_4ADDR]) {
2642                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2643                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2644                 if (err)
2645                         return err;
2646         }
2647
2648         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2649         if (!msg)
2650                 return -ENOMEM;
2651
2652         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2653                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2654                                   &flags);
2655
2656         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2657             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2658                 return -EOPNOTSUPP;
2659
2660         wdev = rdev_add_virtual_intf(rdev,
2661                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2662                                 type, err ? NULL : &flags, &params);
2663         if (WARN_ON(!wdev)) {
2664                 nlmsg_free(msg);
2665                 return -EPROTO;
2666         } else if (IS_ERR(wdev)) {
2667                 nlmsg_free(msg);
2668                 return PTR_ERR(wdev);
2669         }
2670
2671         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2672                 wdev->owner_nlportid = info->snd_portid;
2673
2674         switch (type) {
2675         case NL80211_IFTYPE_MESH_POINT:
2676                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2677                         break;
2678                 wdev_lock(wdev);
2679                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2680                              IEEE80211_MAX_MESH_ID_LEN);
2681                 wdev->mesh_id_up_len =
2682                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2683                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2684                        wdev->mesh_id_up_len);
2685                 wdev_unlock(wdev);
2686                 break;
2687         case NL80211_IFTYPE_P2P_DEVICE:
2688                 /*
2689                  * P2P Device doesn't have a netdev, so doesn't go
2690                  * through the netdev notifier and must be added here
2691                  */
2692                 mutex_init(&wdev->mtx);
2693                 INIT_LIST_HEAD(&wdev->event_list);
2694                 spin_lock_init(&wdev->event_lock);
2695                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2696                 spin_lock_init(&wdev->mgmt_registrations_lock);
2697
2698                 wdev->identifier = ++rdev->wdev_id;
2699                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2700                 rdev->devlist_generation++;
2701                 break;
2702         default:
2703                 break;
2704         }
2705
2706         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2707                                rdev, wdev, false) < 0) {
2708                 nlmsg_free(msg);
2709                 return -ENOBUFS;
2710         }
2711
2712         event = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2713         if (event) {
2714                 if (nl80211_send_iface(event, 0, 0, 0,
2715                                        rdev, wdev, false) < 0) {
2716                         nlmsg_free(event);
2717                         goto out;
2718                 }
2719
2720                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2721                                         event, 0, NL80211_MCGRP_CONFIG,
2722                                         GFP_KERNEL);
2723         }
2724
2725 out:
2726         return genlmsg_reply(msg, info);
2727 }
2728
2729 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2730 {
2731         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2732         struct wireless_dev *wdev = info->user_ptr[1];
2733         struct sk_buff *msg;
2734         int status;
2735
2736         if (!rdev->ops->del_virtual_intf)
2737                 return -EOPNOTSUPP;
2738
2739         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2740         if (msg && nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, true) < 0) {
2741                 nlmsg_free(msg);
2742                 msg = NULL;
2743         }
2744
2745         /*
2746          * If we remove a wireless device without a netdev then clear
2747          * user_ptr[1] so that nl80211_post_doit won't dereference it
2748          * to check if it needs to do dev_put(). Otherwise it crashes
2749          * since the wdev has been freed, unlike with a netdev where
2750          * we need the dev_put() for the netdev to really be freed.
2751          */
2752         if (!wdev->netdev)
2753                 info->user_ptr[1] = NULL;
2754
2755         status = rdev_del_virtual_intf(rdev, wdev);
2756         if (status >= 0 && msg)
2757                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2758                                         msg, 0, NL80211_MCGRP_CONFIG,
2759                                         GFP_KERNEL);
2760         else
2761                 nlmsg_free(msg);
2762
2763         return status;
2764 }
2765
2766 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2767 {
2768         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2769         struct net_device *dev = info->user_ptr[1];
2770         u16 noack_map;
2771
2772         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2773                 return -EINVAL;
2774
2775         if (!rdev->ops->set_noack_map)
2776                 return -EOPNOTSUPP;
2777
2778         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2779
2780         return rdev_set_noack_map(rdev, dev, noack_map);
2781 }
2782
2783 struct get_key_cookie {
2784         struct sk_buff *msg;
2785         int error;
2786         int idx;
2787 };
2788
2789 static void get_key_callback(void *c, struct key_params *params)
2790 {
2791         struct nlattr *key;
2792         struct get_key_cookie *cookie = c;
2793
2794         if ((params->key &&
2795              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2796                      params->key_len, params->key)) ||
2797             (params->seq &&
2798              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2799                      params->seq_len, params->seq)) ||
2800             (params->cipher &&
2801              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2802                          params->cipher)))
2803                 goto nla_put_failure;
2804
2805         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2806         if (!key)
2807                 goto nla_put_failure;
2808
2809         if ((params->key &&
2810              nla_put(cookie->msg, NL80211_KEY_DATA,
2811                      params->key_len, params->key)) ||
2812             (params->seq &&
2813              nla_put(cookie->msg, NL80211_KEY_SEQ,
2814                      params->seq_len, params->seq)) ||
2815             (params->cipher &&
2816              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2817                          params->cipher)))
2818                 goto nla_put_failure;
2819
2820         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2821                 goto nla_put_failure;
2822
2823         nla_nest_end(cookie->msg, key);
2824
2825         return;
2826  nla_put_failure:
2827         cookie->error = 1;
2828 }
2829
2830 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2831 {
2832         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2833         int err;
2834         struct net_device *dev = info->user_ptr[1];
2835         u8 key_idx = 0;
2836         const u8 *mac_addr = NULL;
2837         bool pairwise;
2838         struct get_key_cookie cookie = {
2839                 .error = 0,
2840         };
2841         void *hdr;
2842         struct sk_buff *msg;
2843
2844         if (info->attrs[NL80211_ATTR_KEY_IDX])
2845                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2846
2847         if (key_idx > 5)
2848                 return -EINVAL;
2849
2850         if (info->attrs[NL80211_ATTR_MAC])
2851                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2852
2853         pairwise = !!mac_addr;
2854         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2855                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2856                 if (kt >= NUM_NL80211_KEYTYPES)
2857                         return -EINVAL;
2858                 if (kt != NL80211_KEYTYPE_GROUP &&
2859                     kt != NL80211_KEYTYPE_PAIRWISE)
2860                         return -EINVAL;
2861                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2862         }
2863
2864         if (!rdev->ops->get_key)
2865                 return -EOPNOTSUPP;
2866
2867         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2868         if (!msg)
2869                 return -ENOMEM;
2870
2871         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2872                              NL80211_CMD_NEW_KEY);
2873         if (!hdr)
2874                 goto nla_put_failure;
2875
2876         cookie.msg = msg;
2877         cookie.idx = key_idx;
2878
2879         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2880             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2881                 goto nla_put_failure;
2882         if (mac_addr &&
2883             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2884                 goto nla_put_failure;
2885
2886         if (pairwise && mac_addr &&
2887             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2888                 return -ENOENT;
2889
2890         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2891                            get_key_callback);
2892
2893         if (err)
2894                 goto free_msg;
2895
2896         if (cookie.error)
2897                 goto nla_put_failure;
2898
2899         genlmsg_end(msg, hdr);
2900         return genlmsg_reply(msg, info);
2901
2902  nla_put_failure:
2903         err = -ENOBUFS;
2904  free_msg:
2905         nlmsg_free(msg);
2906         return err;
2907 }
2908
2909 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2910 {
2911         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2912         struct key_parse key;
2913         int err;
2914         struct net_device *dev = info->user_ptr[1];
2915
2916         err = nl80211_parse_key(info, &key);
2917         if (err)
2918                 return err;
2919
2920         if (key.idx < 0)
2921                 return -EINVAL;
2922
2923         /* only support setting default key */
2924         if (!key.def && !key.defmgmt)
2925                 return -EINVAL;
2926
2927         wdev_lock(dev->ieee80211_ptr);
2928
2929         if (key.def) {
2930                 if (!rdev->ops->set_default_key) {
2931                         err = -EOPNOTSUPP;
2932                         goto out;
2933                 }
2934
2935                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2936                 if (err)
2937                         goto out;
2938
2939                 err = rdev_set_default_key(rdev, dev, key.idx,
2940                                                  key.def_uni, key.def_multi);
2941
2942                 if (err)
2943                         goto out;
2944
2945 #ifdef CONFIG_CFG80211_WEXT
2946                 dev->ieee80211_ptr->wext.default_key = key.idx;
2947 #endif
2948         } else {
2949                 if (key.def_uni || !key.def_multi) {
2950                         err = -EINVAL;
2951                         goto out;
2952                 }
2953
2954                 if (!rdev->ops->set_default_mgmt_key) {
2955                         err = -EOPNOTSUPP;
2956                         goto out;
2957                 }
2958
2959                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2960                 if (err)
2961                         goto out;
2962
2963                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2964                 if (err)
2965                         goto out;
2966
2967 #ifdef CONFIG_CFG80211_WEXT
2968                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2969 #endif
2970         }
2971
2972  out:
2973         wdev_unlock(dev->ieee80211_ptr);
2974
2975         return err;
2976 }
2977
2978 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2979 {
2980         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2981         int err;
2982         struct net_device *dev = info->user_ptr[1];
2983         struct key_parse key;
2984         const u8 *mac_addr = NULL;
2985
2986         err = nl80211_parse_key(info, &key);
2987         if (err)
2988                 return err;
2989
2990         if (!key.p.key)
2991                 return -EINVAL;
2992
2993         if (info->attrs[NL80211_ATTR_MAC])
2994                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2995
2996         if (key.type == -1) {
2997                 if (mac_addr)
2998                         key.type = NL80211_KEYTYPE_PAIRWISE;
2999                 else
3000                         key.type = NL80211_KEYTYPE_GROUP;
3001         }
3002
3003         /* for now */
3004         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3005             key.type != NL80211_KEYTYPE_GROUP)
3006                 return -EINVAL;
3007
3008         if (!rdev->ops->add_key)
3009                 return -EOPNOTSUPP;
3010
3011         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3012                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3013                                            mac_addr))
3014                 return -EINVAL;
3015
3016         wdev_lock(dev->ieee80211_ptr);
3017         err = nl80211_key_allowed(dev->ieee80211_ptr);
3018         if (!err)
3019                 err = rdev_add_key(rdev, dev, key.idx,
3020                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3021                                     mac_addr, &key.p);
3022         wdev_unlock(dev->ieee80211_ptr);
3023
3024         return err;
3025 }
3026
3027 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3028 {
3029         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3030         int err;
3031         struct net_device *dev = info->user_ptr[1];
3032         u8 *mac_addr = NULL;
3033         struct key_parse key;
3034
3035         err = nl80211_parse_key(info, &key);
3036         if (err)
3037                 return err;
3038
3039         if (info->attrs[NL80211_ATTR_MAC])
3040                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3041
3042         if (key.type == -1) {
3043                 if (mac_addr)
3044                         key.type = NL80211_KEYTYPE_PAIRWISE;
3045                 else
3046                         key.type = NL80211_KEYTYPE_GROUP;
3047         }
3048
3049         /* for now */
3050         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3051             key.type != NL80211_KEYTYPE_GROUP)
3052                 return -EINVAL;
3053
3054         if (!rdev->ops->del_key)
3055                 return -EOPNOTSUPP;
3056
3057         wdev_lock(dev->ieee80211_ptr);
3058         err = nl80211_key_allowed(dev->ieee80211_ptr);
3059
3060         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
3061             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3062                 err = -ENOENT;
3063
3064         if (!err)
3065                 err = rdev_del_key(rdev, dev, key.idx,
3066                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3067                                    mac_addr);
3068
3069 #ifdef CONFIG_CFG80211_WEXT
3070         if (!err) {
3071                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3072                         dev->ieee80211_ptr->wext.default_key = -1;
3073                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3074                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3075         }
3076 #endif
3077         wdev_unlock(dev->ieee80211_ptr);
3078
3079         return err;
3080 }
3081
3082 /* This function returns an error or the number of nested attributes */
3083 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3084 {
3085         struct nlattr *attr;
3086         int n_entries = 0, tmp;
3087
3088         nla_for_each_nested(attr, nl_attr, tmp) {
3089                 if (nla_len(attr) != ETH_ALEN)
3090                         return -EINVAL;
3091
3092                 n_entries++;
3093         }
3094
3095         return n_entries;
3096 }
3097
3098 /*
3099  * This function parses ACL information and allocates memory for ACL data.
3100  * On successful return, the calling function is responsible to free the
3101  * ACL buffer returned by this function.
3102  */
3103 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3104                                                 struct genl_info *info)
3105 {
3106         enum nl80211_acl_policy acl_policy;
3107         struct nlattr *attr;
3108         struct cfg80211_acl_data *acl;
3109         int i = 0, n_entries, tmp;
3110
3111         if (!wiphy->max_acl_mac_addrs)
3112                 return ERR_PTR(-EOPNOTSUPP);
3113
3114         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3115                 return ERR_PTR(-EINVAL);
3116
3117         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3118         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3119             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3120                 return ERR_PTR(-EINVAL);
3121
3122         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3123                 return ERR_PTR(-EINVAL);
3124
3125         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3126         if (n_entries < 0)
3127                 return ERR_PTR(n_entries);
3128
3129         if (n_entries > wiphy->max_acl_mac_addrs)
3130                 return ERR_PTR(-ENOTSUPP);
3131
3132         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3133                       GFP_KERNEL);
3134         if (!acl)
3135                 return ERR_PTR(-ENOMEM);
3136
3137         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3138                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3139                 i++;
3140         }
3141
3142         acl->n_acl_entries = n_entries;
3143         acl->acl_policy = acl_policy;
3144
3145         return acl;
3146 }
3147
3148 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3149 {
3150         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3151         struct net_device *dev = info->user_ptr[1];
3152         struct cfg80211_acl_data *acl;
3153         int err;
3154
3155         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3156             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3157                 return -EOPNOTSUPP;
3158
3159         if (!dev->ieee80211_ptr->beacon_interval)
3160                 return -EINVAL;
3161
3162         acl = parse_acl_data(&rdev->wiphy, info);
3163         if (IS_ERR(acl))
3164                 return PTR_ERR(acl);
3165
3166         err = rdev_set_mac_acl(rdev, dev, acl);
3167
3168         kfree(acl);
3169
3170         return err;
3171 }
3172
3173 static int nl80211_parse_beacon(struct nlattr *attrs[],
3174                                 struct cfg80211_beacon_data *bcn)
3175 {
3176         bool haveinfo = false;
3177
3178         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3179             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3180             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3181             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3182                 return -EINVAL;
3183
3184         memset(bcn, 0, sizeof(*bcn));
3185
3186         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3187                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3188                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3189                 if (!bcn->head_len)
3190                         return -EINVAL;
3191                 haveinfo = true;
3192         }
3193
3194         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3195                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3196                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3197                 haveinfo = true;
3198         }
3199
3200         if (!haveinfo)
3201                 return -EINVAL;
3202
3203         if (attrs[NL80211_ATTR_IE]) {
3204                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3205                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3206         }
3207
3208         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3209                 bcn->proberesp_ies =
3210                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3211                 bcn->proberesp_ies_len =
3212                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3213         }
3214
3215         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3216                 bcn->assocresp_ies =
3217                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3218                 bcn->assocresp_ies_len =
3219                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3220         }
3221
3222         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3223                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3224                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3225         }
3226
3227         return 0;
3228 }
3229
3230 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3231                                    struct cfg80211_ap_settings *params)
3232 {
3233         struct wireless_dev *wdev;
3234         bool ret = false;
3235
3236         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3237                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3238                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3239                         continue;
3240
3241                 if (!wdev->preset_chandef.chan)
3242                         continue;
3243
3244                 params->chandef = wdev->preset_chandef;
3245                 ret = true;
3246                 break;
3247         }
3248
3249         return ret;
3250 }
3251
3252 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3253                                     enum nl80211_auth_type auth_type,
3254                                     enum nl80211_commands cmd)
3255 {
3256         if (auth_type > NL80211_AUTHTYPE_MAX)
3257                 return false;
3258
3259         switch (cmd) {
3260         case NL80211_CMD_AUTHENTICATE:
3261                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3262                     auth_type == NL80211_AUTHTYPE_SAE)
3263                         return false;
3264                 return true;
3265         case NL80211_CMD_CONNECT:
3266         case NL80211_CMD_START_AP:
3267                 /* SAE not supported yet */
3268                 if (auth_type == NL80211_AUTHTYPE_SAE)
3269                         return false;
3270                 return true;
3271         default:
3272                 return false;
3273         }
3274 }
3275
3276 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3277 {
3278         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3279         struct net_device *dev = info->user_ptr[1];
3280         struct wireless_dev *wdev = dev->ieee80211_ptr;
3281         struct cfg80211_ap_settings params;
3282         int err;
3283
3284         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3285             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3286                 return -EOPNOTSUPP;
3287
3288         if (!rdev->ops->start_ap)
3289                 return -EOPNOTSUPP;
3290
3291         if (wdev->beacon_interval)
3292                 return -EALREADY;
3293
3294         memset(&params, 0, sizeof(params));
3295
3296         /* these are required for START_AP */
3297         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3298             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3299             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3300                 return -EINVAL;
3301
3302         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3303         if (err)
3304                 return err;
3305
3306         params.beacon_interval =
3307                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3308         params.dtim_period =
3309                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3310
3311         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3312         if (err)
3313                 return err;
3314
3315         /*
3316          * In theory, some of these attributes should be required here
3317          * but since they were not used when the command was originally
3318          * added, keep them optional for old user space programs to let
3319          * them continue to work with drivers that do not need the
3320          * additional information -- drivers must check!
3321          */
3322         if (info->attrs[NL80211_ATTR_SSID]) {
3323                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3324                 params.ssid_len =
3325                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3326                 if (params.ssid_len == 0 ||
3327                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3328                         return -EINVAL;
3329         }
3330
3331         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3332                 params.hidden_ssid = nla_get_u32(
3333                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3334                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3335                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3336                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3337                         return -EINVAL;
3338         }
3339
3340         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3341
3342         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3343                 params.auth_type = nla_get_u32(
3344                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3345                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3346                                              NL80211_CMD_START_AP))
3347                         return -EINVAL;
3348         } else
3349                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3350
3351         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3352                                       NL80211_MAX_NR_CIPHER_SUITES);
3353         if (err)
3354                 return err;
3355
3356         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3357                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3358                         return -EOPNOTSUPP;
3359                 params.inactivity_timeout = nla_get_u16(
3360                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3361         }
3362
3363         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3364                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3365                         return -EINVAL;
3366                 params.p2p_ctwindow =
3367                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3368                 if (params.p2p_ctwindow > 127)
3369                         return -EINVAL;
3370                 if (params.p2p_ctwindow != 0 &&
3371                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3372                         return -EINVAL;
3373         }
3374
3375         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3376                 u8 tmp;
3377
3378                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3379                         return -EINVAL;
3380                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3381                 if (tmp > 1)
3382                         return -EINVAL;
3383                 params.p2p_opp_ps = tmp;
3384                 if (params.p2p_opp_ps != 0 &&
3385                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3386                         return -EINVAL;
3387         }
3388
3389         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3390                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3391                 if (err)
3392                         return err;
3393         } else if (wdev->preset_chandef.chan) {
3394                 params.chandef = wdev->preset_chandef;
3395         } else if (!nl80211_get_ap_channel(rdev, &params))
3396                 return -EINVAL;
3397
3398         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef,
3399                                      wdev->iftype))
3400                 return -EINVAL;
3401
3402         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3403                 params.acl = parse_acl_data(&rdev->wiphy, info);
3404                 if (IS_ERR(params.acl))
3405                         return PTR_ERR(params.acl);
3406         }
3407
3408         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3409                 params.smps_mode =
3410                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3411                 switch (params.smps_mode) {
3412                 case NL80211_SMPS_OFF:
3413                         break;
3414                 case NL80211_SMPS_STATIC:
3415                         if (!(rdev->wiphy.features &
3416                               NL80211_FEATURE_STATIC_SMPS))
3417                                 return -EINVAL;
3418                         break;
3419                 case NL80211_SMPS_DYNAMIC:
3420                         if (!(rdev->wiphy.features &
3421                               NL80211_FEATURE_DYNAMIC_SMPS))
3422                                 return -EINVAL;
3423                         break;
3424                 default:
3425                         return -EINVAL;
3426                 }
3427         } else {
3428                 params.smps_mode = NL80211_SMPS_OFF;
3429         }
3430
3431         wdev_lock(wdev);
3432         err = rdev_start_ap(rdev, dev, &params);
3433         if (!err) {
3434                 wdev->preset_chandef = params.chandef;
3435                 wdev->beacon_interval = params.beacon_interval;
3436                 wdev->chandef = params.chandef;
3437                 wdev->ssid_len = params.ssid_len;
3438                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3439         }
3440         wdev_unlock(wdev);
3441
3442         kfree(params.acl);
3443
3444         return err;
3445 }
3446
3447 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3448 {
3449         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3450         struct net_device *dev = info->user_ptr[1];
3451         struct wireless_dev *wdev = dev->ieee80211_ptr;
3452         struct cfg80211_beacon_data params;
3453         int err;
3454
3455         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3456             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3457                 return -EOPNOTSUPP;
3458
3459         if (!rdev->ops->change_beacon)
3460                 return -EOPNOTSUPP;
3461
3462         if (!wdev->beacon_interval)
3463                 return -EINVAL;
3464
3465         err = nl80211_parse_beacon(info->attrs, &params);
3466         if (err)
3467                 return err;
3468
3469         wdev_lock(wdev);
3470         err = rdev_change_beacon(rdev, dev, &params);
3471         wdev_unlock(wdev);
3472
3473         return err;
3474 }
3475
3476 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3477 {
3478         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3479         struct net_device *dev = info->user_ptr[1];
3480
3481         return cfg80211_stop_ap(rdev, dev, false);
3482 }
3483
3484 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3485         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3486         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3487         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3488         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3489         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3490         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3491 };
3492
3493 static int parse_station_flags(struct genl_info *info,
3494                                enum nl80211_iftype iftype,
3495                                struct station_parameters *params)
3496 {
3497         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3498         struct nlattr *nla;
3499         int flag;
3500
3501         /*
3502          * Try parsing the new attribute first so userspace
3503          * can specify both for older kernels.
3504          */
3505         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3506         if (nla) {
3507                 struct nl80211_sta_flag_update *sta_flags;
3508
3509                 sta_flags = nla_data(nla);
3510                 params->sta_flags_mask = sta_flags->mask;
3511                 params->sta_flags_set = sta_flags->set;
3512                 params->sta_flags_set &= params->sta_flags_mask;
3513                 if ((params->sta_flags_mask |
3514                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3515                         return -EINVAL;
3516                 return 0;
3517         }
3518
3519         /* if present, parse the old attribute */
3520
3521         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3522         if (!nla)
3523                 return 0;
3524
3525         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3526                              nla, sta_flags_policy))
3527                 return -EINVAL;
3528
3529         /*
3530          * Only allow certain flags for interface types so that
3531          * other attributes are silently ignored. Remember that
3532          * this is backward compatibility code with old userspace
3533          * and shouldn't be hit in other cases anyway.
3534          */
3535         switch (iftype) {
3536         case NL80211_IFTYPE_AP:
3537         case NL80211_IFTYPE_AP_VLAN:
3538         case NL80211_IFTYPE_P2P_GO:
3539                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3540                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3541                                          BIT(NL80211_STA_FLAG_WME) |
3542                                          BIT(NL80211_STA_FLAG_MFP);
3543                 break;
3544         case NL80211_IFTYPE_P2P_CLIENT:
3545         case NL80211_IFTYPE_STATION:
3546                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3547                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3548                 break;
3549         case NL80211_IFTYPE_MESH_POINT:
3550                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3551                                          BIT(NL80211_STA_FLAG_MFP) |
3552                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3553         default:
3554                 return -EINVAL;
3555         }
3556
3557         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3558                 if (flags[flag]) {
3559                         params->sta_flags_set |= (1<<flag);
3560
3561                         /* no longer support new API additions in old API */
3562                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3563                                 return -EINVAL;
3564                 }
3565         }
3566
3567         return 0;
3568 }
3569
3570 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3571                                  int attr)
3572 {
3573         struct nlattr *rate;
3574         u32 bitrate;
3575         u16 bitrate_compat;
3576
3577         rate = nla_nest_start(msg, attr);
3578         if (!rate)
3579                 return false;
3580
3581         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3582         bitrate = cfg80211_calculate_bitrate(info);
3583         /* report 16-bit bitrate only if we can */
3584         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3585         if (bitrate > 0 &&
3586             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3587                 return false;
3588         if (bitrate_compat > 0 &&
3589             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3590                 return false;
3591
3592         if (info->flags & RATE_INFO_FLAGS_MCS) {
3593                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3594                         return false;
3595                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3596                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3597                         return false;
3598                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3599                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3600                         return false;
3601         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3602                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3603                         return false;
3604                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3605                         return false;
3606                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3607                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3608                         return false;
3609                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3610                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3611                         return false;
3612                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3613                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3614                         return false;
3615                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3616                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3617                         return false;
3618                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3619                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3620                         return false;
3621         }
3622
3623         nla_nest_end(msg, rate);
3624         return true;
3625 }
3626
3627 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3628                                int id)
3629 {
3630         void *attr;
3631         int i = 0;
3632
3633         if (!mask)
3634                 return true;
3635
3636         attr = nla_nest_start(msg, id);
3637         if (!attr)
3638                 return false;
3639
3640         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3641                 if (!(mask & BIT(i)))
3642                         continue;
3643
3644                 if (nla_put_u8(msg, i, signal[i]))
3645                         return false;
3646         }
3647
3648         nla_nest_end(msg, attr);
3649
3650         return true;
3651 }
3652
3653 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3654                                 int flags,
3655                                 struct cfg80211_registered_device *rdev,
3656                                 struct net_device *dev,
3657                                 const u8 *mac_addr, struct station_info *sinfo)
3658 {
3659         void *hdr;
3660         struct nlattr *sinfoattr, *bss_param;
3661
3662         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3663         if (!hdr)
3664                 return -1;
3665
3666         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3667             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3668             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3669                 goto nla_put_failure;
3670
3671         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3672         if (!sinfoattr)
3673                 goto nla_put_failure;
3674         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3675             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3676                         sinfo->connected_time))
3677                 goto nla_put_failure;
3678         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3679             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3680                         sinfo->inactive_time))
3681                 goto nla_put_failure;
3682         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3683                               STATION_INFO_RX_BYTES64)) &&
3684             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3685                         (u32)sinfo->rx_bytes))
3686                 goto nla_put_failure;
3687         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3688                               STATION_INFO_TX_BYTES64)) &&
3689             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3690                         (u32)sinfo->tx_bytes))
3691                 goto nla_put_failure;
3692         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3693             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3694                         sinfo->rx_bytes))
3695                 goto nla_put_failure;
3696         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3697             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3698                         sinfo->tx_bytes))
3699                 goto nla_put_failure;
3700         if ((sinfo->filled & STATION_INFO_LLID) &&
3701             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3702                 goto nla_put_failure;
3703         if ((sinfo->filled & STATION_INFO_PLID) &&
3704             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3705                 goto nla_put_failure;
3706         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3707             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3708                        sinfo->plink_state))
3709                 goto nla_put_failure;
3710         switch (rdev->wiphy.signal_type) {
3711         case CFG80211_SIGNAL_TYPE_MBM:
3712                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3713                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3714                                sinfo->signal))
3715                         goto nla_put_failure;
3716                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3717                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3718                                sinfo->signal_avg))
3719                         goto nla_put_failure;
3720                 break;
3721         default:
3722                 break;
3723         }
3724         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
3725                 if (!nl80211_put_signal(msg, sinfo->chains,
3726                                         sinfo->chain_signal,
3727                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3728                         goto nla_put_failure;
3729         }
3730         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
3731                 if (!nl80211_put_signal(msg, sinfo->chains,
3732                                         sinfo->chain_signal_avg,
3733                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3734                         goto nla_put_failure;
3735         }
3736         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3737                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3738                                           NL80211_STA_INFO_TX_BITRATE))
3739                         goto nla_put_failure;
3740         }
3741         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3742                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3743                                           NL80211_STA_INFO_RX_BITRATE))
3744                         goto nla_put_failure;
3745         }
3746         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3747             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3748                         sinfo->rx_packets))
3749                 goto nla_put_failure;
3750         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3751             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3752                         sinfo->tx_packets))
3753                 goto nla_put_failure;
3754         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3755             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3756                         sinfo->tx_retries))
3757                 goto nla_put_failure;
3758         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3759             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3760                         sinfo->tx_failed))
3761                 goto nla_put_failure;
3762         if ((sinfo->filled & STATION_INFO_EXPECTED_THROUGHPUT) &&
3763             nla_put_u32(msg, NL80211_STA_INFO_EXPECTED_THROUGHPUT,
3764                         sinfo->expected_throughput))
3765                 goto nla_put_failure;
3766         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3767             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3768                         sinfo->beacon_loss_count))
3769                 goto nla_put_failure;
3770         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3771             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3772                         sinfo->local_pm))
3773                 goto nla_put_failure;
3774         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3775             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3776                         sinfo->peer_pm))
3777                 goto nla_put_failure;
3778         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3779             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3780                         sinfo->nonpeer_pm))
3781                 goto nla_put_failure;
3782         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3783                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3784                 if (!bss_param)
3785                         goto nla_put_failure;
3786
3787                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3788                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3789                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3790                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3791                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3792                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3793                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3794                                sinfo->bss_param.dtim_period) ||
3795                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3796                                 sinfo->bss_param.beacon_interval))
3797                         goto nla_put_failure;
3798
3799                 nla_nest_end(msg, bss_param);
3800         }
3801         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3802             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3803                     sizeof(struct nl80211_sta_flag_update),
3804                     &sinfo->sta_flags))
3805                 goto nla_put_failure;
3806         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3807                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3808                             sinfo->t_offset))
3809                 goto nla_put_failure;
3810         nla_nest_end(msg, sinfoattr);
3811
3812         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3813             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3814                     sinfo->assoc_req_ies))
3815                 goto nla_put_failure;
3816
3817         return genlmsg_end(msg, hdr);
3818
3819  nla_put_failure:
3820         genlmsg_cancel(msg, hdr);
3821         return -EMSGSIZE;
3822 }
3823
3824 static int nl80211_dump_station(struct sk_buff *skb,
3825                                 struct netlink_callback *cb)
3826 {
3827         struct station_info sinfo;
3828         struct cfg80211_registered_device *rdev;
3829         struct wireless_dev *wdev;
3830         u8 mac_addr[ETH_ALEN];
3831         int sta_idx = cb->args[2];
3832         int err;
3833
3834         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
3835         if (err)
3836                 return err;
3837
3838         if (!wdev->netdev) {
3839                 err = -EINVAL;
3840                 goto out_err;
3841         }
3842
3843         if (!rdev->ops->dump_station) {
3844                 err = -EOPNOTSUPP;
3845                 goto out_err;
3846         }
3847
3848         while (1) {
3849                 memset(&sinfo, 0, sizeof(sinfo));
3850                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
3851                                         mac_addr, &sinfo);
3852                 if (err == -ENOENT)
3853                         break;
3854                 if (err)
3855                         goto out_err;
3856
3857                 if (nl80211_send_station(skb,
3858                                 NETLINK_CB(cb->skb).portid,
3859                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3860                                 rdev, wdev->netdev, mac_addr,
3861                                 &sinfo) < 0)
3862                         goto out;
3863
3864                 sta_idx++;
3865         }
3866
3867
3868  out:
3869         cb->args[2] = sta_idx;
3870         err = skb->len;
3871  out_err:
3872         nl80211_finish_wdev_dump(rdev);
3873
3874         return err;
3875 }
3876
3877 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3878 {
3879         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3880         struct net_device *dev = info->user_ptr[1];
3881         struct station_info sinfo;
3882         struct sk_buff *msg;
3883         u8 *mac_addr = NULL;
3884         int err;
3885
3886         memset(&sinfo, 0, sizeof(sinfo));
3887
3888         if (!info->attrs[NL80211_ATTR_MAC])
3889                 return -EINVAL;
3890
3891         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3892
3893         if (!rdev->ops->get_station)
3894                 return -EOPNOTSUPP;
3895
3896         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3897         if (err)
3898                 return err;
3899
3900         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3901         if (!msg)
3902                 return -ENOMEM;
3903
3904         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3905                                  rdev, dev, mac_addr, &sinfo) < 0) {
3906                 nlmsg_free(msg);
3907                 return -ENOBUFS;
3908         }
3909
3910         return genlmsg_reply(msg, info);
3911 }
3912
3913 int cfg80211_check_station_change(struct wiphy *wiphy,
3914                                   struct station_parameters *params,
3915                                   enum cfg80211_station_type statype)
3916 {
3917         if (params->listen_interval != -1)
3918                 return -EINVAL;
3919         if (params->aid &&
3920             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3921                 return -EINVAL;
3922
3923         /* When you run into this, adjust the code below for the new flag */
3924         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3925
3926         switch (statype) {
3927         case CFG80211_STA_MESH_PEER_KERNEL:
3928         case CFG80211_STA_MESH_PEER_USER:
3929                 /*
3930                  * No ignoring the TDLS flag here -- the userspace mesh
3931                  * code doesn't have the bug of including TDLS in the
3932                  * mask everywhere.
3933                  */
3934                 if (params->sta_flags_mask &
3935                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3936                                   BIT(NL80211_STA_FLAG_MFP) |
3937                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3938                         return -EINVAL;
3939                 break;
3940         case CFG80211_STA_TDLS_PEER_SETUP:
3941         case CFG80211_STA_TDLS_PEER_ACTIVE:
3942                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3943                         return -EINVAL;
3944                 /* ignore since it can't change */
3945                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3946                 break;
3947         default:
3948                 /* disallow mesh-specific things */
3949                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3950                         return -EINVAL;
3951                 if (params->local_pm)
3952                         return -EINVAL;
3953                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3954                         return -EINVAL;
3955         }
3956
3957         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3958             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3959                 /* TDLS can't be set, ... */
3960                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3961                         return -EINVAL;
3962                 /*
3963                  * ... but don't bother the driver with it. This works around
3964                  * a hostapd/wpa_supplicant issue -- it always includes the
3965                  * TLDS_PEER flag in the mask even for AP mode.
3966                  */
3967                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3968         }
3969
3970         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3971                 /* reject other things that can't change */
3972                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3973                         return -EINVAL;
3974                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3975                         return -EINVAL;
3976                 if (params->supported_rates)
3977                         return -EINVAL;
3978                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3979                         return -EINVAL;
3980         }
3981
3982         if (statype != CFG80211_STA_AP_CLIENT) {
3983                 if (params->vlan)
3984                         return -EINVAL;
3985         }
3986
3987         switch (statype) {
3988         case CFG80211_STA_AP_MLME_CLIENT:
3989                 /* Use this only for authorizing/unauthorizing a station */
3990                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3991                         return -EOPNOTSUPP;
3992                 break;
3993         case CFG80211_STA_AP_CLIENT:
3994                 /* accept only the listed bits */
3995                 if (params->sta_flags_mask &
3996                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3997                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3998                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3999                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4000                                   BIT(NL80211_STA_FLAG_WME) |
4001                                   BIT(NL80211_STA_FLAG_MFP)))
4002                         return -EINVAL;
4003
4004                 /* but authenticated/associated only if driver handles it */
4005                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4006                     params->sta_flags_mask &
4007                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4008                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4009                         return -EINVAL;
4010                 break;
4011         case CFG80211_STA_IBSS:
4012         case CFG80211_STA_AP_STA:
4013                 /* reject any changes other than AUTHORIZED */
4014                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4015                         return -EINVAL;
4016                 break;
4017         case CFG80211_STA_TDLS_PEER_SETUP:
4018                 /* reject any changes other than AUTHORIZED or WME */
4019                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4020                                                BIT(NL80211_STA_FLAG_WME)))
4021                         return -EINVAL;
4022                 /* force (at least) rates when authorizing */
4023                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4024                     !params->supported_rates)
4025                         return -EINVAL;
4026                 break;
4027         case CFG80211_STA_TDLS_PEER_ACTIVE:
4028                 /* reject any changes */
4029                 return -EINVAL;
4030         case CFG80211_STA_MESH_PEER_KERNEL:
4031                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4032                         return -EINVAL;
4033                 break;
4034         case CFG80211_STA_MESH_PEER_USER:
4035                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4036                         return -EINVAL;
4037                 break;
4038         }
4039
4040         return 0;
4041 }
4042 EXPORT_SYMBOL(cfg80211_check_station_change);
4043
4044 /*
4045  * Get vlan interface making sure it is running and on the right wiphy.
4046  */
4047 static struct net_device *get_vlan(struct genl_info *info,
4048                                    struct cfg80211_registered_device *rdev)
4049 {
4050         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4051         struct net_device *v;
4052         int ret;
4053
4054         if (!vlanattr)
4055                 return NULL;
4056
4057         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4058         if (!v)
4059                 return ERR_PTR(-ENODEV);
4060
4061         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4062                 ret = -EINVAL;
4063                 goto error;
4064         }
4065
4066         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4067             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4068             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4069                 ret = -EINVAL;
4070                 goto error;
4071         }
4072
4073         if (!netif_running(v)) {
4074                 ret = -ENETDOWN;
4075                 goto error;
4076         }
4077
4078         return v;
4079  error:
4080         dev_put(v);
4081         return ERR_PTR(ret);
4082 }
4083
4084 static const struct nla_policy
4085 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4086         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4087         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4088 };
4089
4090 static int nl80211_parse_sta_wme(struct genl_info *info,
4091                                  struct station_parameters *params)
4092 {
4093         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4094         struct nlattr *nla;
4095         int err;
4096
4097         /* parse WME attributes if present */
4098         if (!info->attrs[NL80211_ATTR_STA_WME])
4099                 return 0;
4100
4101         nla = info->attrs[NL80211_ATTR_STA_WME];
4102         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4103                                nl80211_sta_wme_policy);
4104         if (err)
4105                 return err;
4106
4107         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4108                 params->uapsd_queues = nla_get_u8(
4109                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4110         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4111                 return -EINVAL;
4112
4113         if (tb[NL80211_STA_WME_MAX_SP])
4114                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4115
4116         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4117                 return -EINVAL;
4118
4119         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4120
4121         return 0;
4122 }
4123
4124 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4125                                       struct station_parameters *params)
4126 {
4127         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4128                 params->supported_channels =
4129                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4130                 params->supported_channels_len =
4131                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4132                 /*
4133                  * Need to include at least one (first channel, number of
4134                  * channels) tuple for each subband, and must have proper
4135                  * tuples for the rest of the data as well.
4136                  */
4137                 if (params->supported_channels_len < 2)
4138                         return -EINVAL;
4139                 if (params->supported_channels_len % 2)
4140                         return -EINVAL;
4141         }
4142
4143         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4144                 params->supported_oper_classes =
4145                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4146                 params->supported_oper_classes_len =
4147                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4148                 /*
4149                  * The value of the Length field of the Supported Operating
4150                  * Classes element is between 2 and 253.
4151                  */
4152                 if (params->supported_oper_classes_len < 2 ||
4153                     params->supported_oper_classes_len > 253)
4154                         return -EINVAL;
4155         }
4156         return 0;
4157 }
4158
4159 static int nl80211_set_station_tdls(struct genl_info *info,
4160                                     struct station_parameters *params)
4161 {
4162         int err;
4163         /* Dummy STA entry gets updated once the peer capabilities are known */
4164         if (info->attrs[NL80211_ATTR_PEER_AID])
4165                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4166         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4167                 params->ht_capa =
4168                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4169         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4170                 params->vht_capa =
4171                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4172
4173         err = nl80211_parse_sta_channel_info(info, params);
4174         if (err)
4175                 return err;
4176
4177         return nl80211_parse_sta_wme(info, params);
4178 }
4179
4180 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4181 {
4182         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4183         struct net_device *dev = info->user_ptr[1];
4184         struct station_parameters params;
4185         u8 *mac_addr;
4186         int err;
4187
4188         memset(&params, 0, sizeof(params));
4189
4190         params.listen_interval = -1;
4191
4192         if (!rdev->ops->change_station)
4193                 return -EOPNOTSUPP;
4194
4195         if (info->attrs[NL80211_ATTR_STA_AID])
4196                 return -EINVAL;
4197
4198         if (!info->attrs[NL80211_ATTR_MAC])
4199                 return -EINVAL;
4200
4201         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4202
4203         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4204                 params.supported_rates =
4205                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4206                 params.supported_rates_len =
4207                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4208         }
4209
4210         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4211                 params.capability =
4212                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4213                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4214         }
4215
4216         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4217                 params.ext_capab =
4218                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4219                 params.ext_capab_len =
4220                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4221         }
4222
4223         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4224                 return -EINVAL;
4225
4226         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4227                 return -EINVAL;
4228
4229         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4230                 params.plink_action =
4231                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4232                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4233                         return -EINVAL;
4234         }
4235
4236         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4237                 params.plink_state =
4238                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4239                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4240                         return -EINVAL;
4241                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4242         }
4243
4244         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4245                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4246                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4247
4248                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4249                     pm > NL80211_MESH_POWER_MAX)
4250                         return -EINVAL;
4251
4252                 params.local_pm = pm;
4253         }
4254
4255         /* Include parameters for TDLS peer (will check later) */
4256         err = nl80211_set_station_tdls(info, &params);
4257         if (err)
4258                 return err;
4259
4260         params.vlan = get_vlan(info, rdev);
4261         if (IS_ERR(params.vlan))
4262                 return PTR_ERR(params.vlan);
4263
4264         switch (dev->ieee80211_ptr->iftype) {
4265         case NL80211_IFTYPE_AP:
4266         case NL80211_IFTYPE_AP_VLAN:
4267         case NL80211_IFTYPE_P2P_GO:
4268         case NL80211_IFTYPE_P2P_CLIENT:
4269         case NL80211_IFTYPE_STATION:
4270         case NL80211_IFTYPE_ADHOC:
4271         case NL80211_IFTYPE_MESH_POINT:
4272                 break;
4273         default:
4274                 err = -EOPNOTSUPP;
4275                 goto out_put_vlan;
4276         }
4277
4278         /* driver will call cfg80211_check_station_change() */
4279         err = rdev_change_station(rdev, dev, mac_addr, &params);
4280
4281  out_put_vlan:
4282         if (params.vlan)
4283                 dev_put(params.vlan);
4284
4285         return err;
4286 }
4287
4288 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4289 {
4290         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4291         int err;
4292         struct net_device *dev = info->user_ptr[1];
4293         struct station_parameters params;
4294         u8 *mac_addr = NULL;
4295
4296         memset(&params, 0, sizeof(params));
4297
4298         if (!rdev->ops->add_station)
4299                 return -EOPNOTSUPP;
4300
4301         if (!info->attrs[NL80211_ATTR_MAC])
4302                 return -EINVAL;
4303
4304         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4305                 return -EINVAL;
4306
4307         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4308                 return -EINVAL;
4309
4310         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4311             !info->attrs[NL80211_ATTR_PEER_AID])
4312                 return -EINVAL;
4313
4314         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4315         params.supported_rates =
4316                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4317         params.supported_rates_len =
4318                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4319         params.listen_interval =
4320                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4321
4322         if (info->attrs[NL80211_ATTR_PEER_AID])
4323                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4324         else
4325                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4326         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4327                 return -EINVAL;
4328
4329         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4330                 params.capability =
4331                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4332                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4333         }
4334
4335         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4336                 params.ext_capab =
4337                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4338                 params.ext_capab_len =
4339                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4340         }
4341
4342         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4343                 params.ht_capa =
4344                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4345
4346         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4347                 params.vht_capa =
4348                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4349
4350         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4351                 params.opmode_notif_used = true;
4352                 params.opmode_notif =
4353                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4354         }
4355
4356         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4357                 params.plink_action =
4358                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4359                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4360                         return -EINVAL;
4361         }
4362
4363         err = nl80211_parse_sta_channel_info(info, &params);
4364         if (err)
4365                 return err;
4366
4367         err = nl80211_parse_sta_wme(info, &params);
4368         if (err)
4369                 return err;
4370
4371         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4372                 return -EINVAL;
4373
4374         /* When you run into this, adjust the code below for the new flag */
4375         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4376
4377         switch (dev->ieee80211_ptr->iftype) {
4378         case NL80211_IFTYPE_AP:
4379         case NL80211_IFTYPE_AP_VLAN:
4380         case NL80211_IFTYPE_P2P_GO:
4381                 /* ignore WME attributes if iface/sta is not capable */
4382                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4383                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4384                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4385
4386                 /* TDLS peers cannot be added */
4387                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4388                     info->attrs[NL80211_ATTR_PEER_AID])
4389                         return -EINVAL;
4390                 /* but don't bother the driver with it */
4391                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4392
4393                 /* allow authenticated/associated only if driver handles it */
4394                 if (!(rdev->wiphy.features &
4395                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4396                     params.sta_flags_mask &
4397                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4398                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4399                         return -EINVAL;
4400
4401                 /* must be last in here for error handling */
4402                 params.vlan = get_vlan(info, rdev);
4403                 if (IS_ERR(params.vlan))
4404                         return PTR_ERR(params.vlan);
4405                 break;
4406         case NL80211_IFTYPE_MESH_POINT:
4407                 /* ignore uAPSD data */
4408                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4409
4410                 /* associated is disallowed */
4411                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4412                         return -EINVAL;
4413                 /* TDLS peers cannot be added */
4414                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4415                     info->attrs[NL80211_ATTR_PEER_AID])
4416                         return -EINVAL;
4417                 break;
4418         case NL80211_IFTYPE_STATION:
4419         case NL80211_IFTYPE_P2P_CLIENT:
4420                 /* ignore uAPSD data */
4421                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4422
4423                 /* these are disallowed */
4424                 if (params.sta_flags_mask &
4425                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4426                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4427                         return -EINVAL;
4428                 /* Only TDLS peers can be added */
4429                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4430                         return -EINVAL;
4431                 /* Can only add if TDLS ... */
4432                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4433                         return -EOPNOTSUPP;
4434                 /* ... with external setup is supported */
4435                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4436                         return -EOPNOTSUPP;
4437                 /*
4438                  * Older wpa_supplicant versions always mark the TDLS peer
4439                  * as authorized, but it shouldn't yet be.
4440                  */
4441                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4442                 break;
4443         default:
4444                 return -EOPNOTSUPP;
4445         }
4446
4447         /* be aware of params.vlan when changing code here */
4448
4449         err = rdev_add_station(rdev, dev, mac_addr, &params);
4450
4451         if (params.vlan)
4452                 dev_put(params.vlan);
4453         return err;
4454 }
4455
4456 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4457 {
4458         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4459         struct net_device *dev = info->user_ptr[1];
4460         struct station_del_parameters params;
4461
4462         memset(&params, 0, sizeof(params));
4463
4464         if (info->attrs[NL80211_ATTR_MAC])
4465                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4466
4467         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4468             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4469             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4470             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4471                 return -EINVAL;
4472
4473         if (!rdev->ops->del_station)
4474                 return -EOPNOTSUPP;
4475
4476         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4477                 params.subtype =
4478                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4479                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4480                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4481                         return -EINVAL;
4482         } else {
4483                 /* Default to Deauthentication frame */
4484                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4485         }
4486
4487         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4488                 params.reason_code =
4489                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4490                 if (params.reason_code == 0)
4491                         return -EINVAL; /* 0 is reserved */
4492         } else {
4493                 /* Default to reason code 2 */
4494                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4495         }
4496
4497         return rdev_del_station(rdev, dev, &params);
4498 }
4499
4500 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4501                                 int flags, struct net_device *dev,
4502                                 u8 *dst, u8 *next_hop,
4503                                 struct mpath_info *pinfo)
4504 {
4505         void *hdr;
4506         struct nlattr *pinfoattr;
4507
4508         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4509         if (!hdr)
4510                 return -1;
4511
4512         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4513             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4514             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4515             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4516                 goto nla_put_failure;
4517
4518         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4519         if (!pinfoattr)
4520                 goto nla_put_failure;
4521         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4522             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4523                         pinfo->frame_qlen))
4524                 goto nla_put_failure;
4525         if (((pinfo->filled & MPATH_INFO_SN) &&
4526              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4527             ((pinfo->filled & MPATH_INFO_METRIC) &&
4528              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4529                          pinfo->metric)) ||
4530             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4531              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4532                          pinfo->exptime)) ||
4533             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4534              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4535                         pinfo->flags)) ||
4536             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4537              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4538                          pinfo->discovery_timeout)) ||
4539             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4540              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4541                         pinfo->discovery_retries)))
4542                 goto nla_put_failure;
4543
4544         nla_nest_end(msg, pinfoattr);
4545
4546         return genlmsg_end(msg, hdr);
4547
4548  nla_put_failure:
4549         genlmsg_cancel(msg, hdr);
4550         return -EMSGSIZE;
4551 }
4552
4553 static int nl80211_dump_mpath(struct sk_buff *skb,
4554                               struct netlink_callback *cb)
4555 {
4556         struct mpath_info pinfo;
4557         struct cfg80211_registered_device *rdev;
4558         struct wireless_dev *wdev;
4559         u8 dst[ETH_ALEN];
4560         u8 next_hop[ETH_ALEN];
4561         int path_idx = cb->args[2];
4562         int err;
4563
4564         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4565         if (err)
4566                 return err;
4567
4568         if (!rdev->ops->dump_mpath) {
4569                 err = -EOPNOTSUPP;
4570                 goto out_err;
4571         }
4572
4573         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4574                 err = -EOPNOTSUPP;
4575                 goto out_err;
4576         }
4577
4578         while (1) {
4579                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4580                                       next_hop, &pinfo);
4581                 if (err == -ENOENT)
4582                         break;
4583                 if (err)
4584                         goto out_err;
4585
4586                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4587                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4588                                        wdev->netdev, dst, next_hop,
4589                                        &pinfo) < 0)
4590                         goto out;
4591
4592                 path_idx++;
4593         }
4594
4595
4596  out:
4597         cb->args[2] = path_idx;
4598         err = skb->len;
4599  out_err:
4600         nl80211_finish_wdev_dump(rdev);
4601         return err;
4602 }
4603
4604 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4605 {
4606         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4607         int err;
4608         struct net_device *dev = info->user_ptr[1];
4609         struct mpath_info pinfo;
4610         struct sk_buff *msg;
4611         u8 *dst = NULL;
4612         u8 next_hop[ETH_ALEN];
4613
4614         memset(&pinfo, 0, sizeof(pinfo));
4615
4616         if (!info->attrs[NL80211_ATTR_MAC])
4617                 return -EINVAL;
4618
4619         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4620
4621         if (!rdev->ops->get_mpath)
4622                 return -EOPNOTSUPP;
4623
4624         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4625                 return -EOPNOTSUPP;
4626
4627         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4628         if (err)
4629                 return err;
4630
4631         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4632         if (!msg)
4633                 return -ENOMEM;
4634
4635         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4636                                  dev, dst, next_hop, &pinfo) < 0) {
4637                 nlmsg_free(msg);
4638                 return -ENOBUFS;
4639         }
4640
4641         return genlmsg_reply(msg, info);
4642 }
4643
4644 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4645 {
4646         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4647         struct net_device *dev = info->user_ptr[1];
4648         u8 *dst = NULL;
4649         u8 *next_hop = NULL;
4650
4651         if (!info->attrs[NL80211_ATTR_MAC])
4652                 return -EINVAL;
4653
4654         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4655                 return -EINVAL;
4656
4657         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4658         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4659
4660         if (!rdev->ops->change_mpath)
4661                 return -EOPNOTSUPP;
4662
4663         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4664                 return -EOPNOTSUPP;
4665
4666         return rdev_change_mpath(rdev, dev, dst, next_hop);
4667 }
4668
4669 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4670 {
4671         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4672         struct net_device *dev = info->user_ptr[1];
4673         u8 *dst = NULL;
4674         u8 *next_hop = NULL;
4675
4676         if (!info->attrs[NL80211_ATTR_MAC])
4677                 return -EINVAL;
4678
4679         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4680                 return -EINVAL;
4681
4682         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4683         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4684
4685         if (!rdev->ops->add_mpath)
4686                 return -EOPNOTSUPP;
4687
4688         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4689                 return -EOPNOTSUPP;
4690
4691         return rdev_add_mpath(rdev, dev, dst, next_hop);
4692 }
4693
4694 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4695 {
4696         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4697         struct net_device *dev = info->user_ptr[1];
4698         u8 *dst = NULL;
4699
4700         if (info->attrs[NL80211_ATTR_MAC])
4701                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4702
4703         if (!rdev->ops->del_mpath)
4704                 return -EOPNOTSUPP;
4705
4706         return rdev_del_mpath(rdev, dev, dst);
4707 }
4708
4709 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4710 {
4711         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4712         int err;
4713         struct net_device *dev = info->user_ptr[1];
4714         struct mpath_info pinfo;
4715         struct sk_buff *msg;
4716         u8 *dst = NULL;
4717         u8 mpp[ETH_ALEN];
4718
4719         memset(&pinfo, 0, sizeof(pinfo));
4720
4721         if (!info->attrs[NL80211_ATTR_MAC])
4722                 return -EINVAL;
4723
4724         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4725
4726         if (!rdev->ops->get_mpp)
4727                 return -EOPNOTSUPP;
4728
4729         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4730                 return -EOPNOTSUPP;
4731
4732         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
4733         if (err)
4734                 return err;
4735
4736         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4737         if (!msg)
4738                 return -ENOMEM;
4739
4740         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4741                                dev, dst, mpp, &pinfo) < 0) {
4742                 nlmsg_free(msg);
4743                 return -ENOBUFS;
4744         }
4745
4746         return genlmsg_reply(msg, info);
4747 }
4748
4749 static int nl80211_dump_mpp(struct sk_buff *skb,
4750                             struct netlink_callback *cb)
4751 {
4752         struct mpath_info pinfo;
4753         struct cfg80211_registered_device *rdev;
4754         struct wireless_dev *wdev;
4755         u8 dst[ETH_ALEN];
4756         u8 mpp[ETH_ALEN];
4757         int path_idx = cb->args[2];
4758         int err;
4759
4760         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4761         if (err)
4762                 return err;
4763
4764         if (!rdev->ops->dump_mpp) {
4765                 err = -EOPNOTSUPP;
4766                 goto out_err;
4767         }
4768
4769         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4770                 err = -EOPNOTSUPP;
4771                 goto out_err;
4772         }
4773
4774         while (1) {
4775                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
4776                                     mpp, &pinfo);
4777                 if (err == -ENOENT)
4778                         break;
4779                 if (err)
4780                         goto out_err;
4781
4782                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4783                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4784                                        wdev->netdev, dst, mpp,
4785                                        &pinfo) < 0)
4786                         goto out;
4787
4788                 path_idx++;
4789         }
4790
4791  out:
4792         cb->args[2] = path_idx;
4793         err = skb->len;
4794  out_err:
4795         nl80211_finish_wdev_dump(rdev);
4796         return err;
4797 }
4798
4799 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4800 {
4801         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4802         struct net_device *dev = info->user_ptr[1];
4803         struct wireless_dev *wdev = dev->ieee80211_ptr;
4804         struct bss_parameters params;
4805         int err;
4806
4807         memset(&params, 0, sizeof(params));
4808         /* default to not changing parameters */
4809         params.use_cts_prot = -1;
4810         params.use_short_preamble = -1;
4811         params.use_short_slot_time = -1;
4812         params.ap_isolate = -1;
4813         params.ht_opmode = -1;
4814         params.p2p_ctwindow = -1;
4815         params.p2p_opp_ps = -1;
4816
4817         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4818                 params.use_cts_prot =
4819                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4820         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4821                 params.use_short_preamble =
4822                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4823         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4824                 params.use_short_slot_time =
4825                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4826         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4827                 params.basic_rates =
4828                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4829                 params.basic_rates_len =
4830                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4831         }
4832         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4833                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4834         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4835                 params.ht_opmode =
4836                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4837
4838         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4839                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4840                         return -EINVAL;
4841                 params.p2p_ctwindow =
4842                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4843                 if (params.p2p_ctwindow < 0)
4844                         return -EINVAL;
4845                 if (params.p2p_ctwindow != 0 &&
4846                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4847                         return -EINVAL;
4848         }
4849
4850         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4851                 u8 tmp;
4852
4853                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4854                         return -EINVAL;
4855                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4856                 if (tmp > 1)
4857                         return -EINVAL;
4858                 params.p2p_opp_ps = tmp;
4859                 if (params.p2p_opp_ps &&
4860                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4861                         return -EINVAL;
4862         }
4863
4864         if (!rdev->ops->change_bss)
4865                 return -EOPNOTSUPP;
4866
4867         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4868             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4869                 return -EOPNOTSUPP;
4870
4871         wdev_lock(wdev);
4872         err = rdev_change_bss(rdev, dev, &params);
4873         wdev_unlock(wdev);
4874
4875         return err;
4876 }
4877
4878 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4879         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4880         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4881         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4882         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4883         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4884         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4885         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
4886 };
4887
4888 static int parse_reg_rule(struct nlattr *tb[],
4889         struct ieee80211_reg_rule *reg_rule)
4890 {
4891         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4892         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4893
4894         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4895                 return -EINVAL;
4896         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4897                 return -EINVAL;
4898         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4899                 return -EINVAL;
4900         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4901                 return -EINVAL;
4902         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4903                 return -EINVAL;
4904
4905         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4906
4907         freq_range->start_freq_khz =
4908                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4909         freq_range->end_freq_khz =
4910                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4911         freq_range->max_bandwidth_khz =
4912                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4913
4914         power_rule->max_eirp =
4915                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4916
4917         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4918                 power_rule->max_antenna_gain =
4919                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4920
4921         if (tb[NL80211_ATTR_DFS_CAC_TIME])
4922                 reg_rule->dfs_cac_ms =
4923                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
4924
4925         return 0;
4926 }
4927
4928 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4929 {
4930         char *data = NULL;
4931         enum nl80211_user_reg_hint_type user_reg_hint_type;
4932
4933         /*
4934          * You should only get this when cfg80211 hasn't yet initialized
4935          * completely when built-in to the kernel right between the time
4936          * window between nl80211_init() and regulatory_init(), if that is
4937          * even possible.
4938          */
4939         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4940                 return -EINPROGRESS;
4941
4942         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4943                 user_reg_hint_type =
4944                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4945         else
4946                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4947
4948         switch (user_reg_hint_type) {
4949         case NL80211_USER_REG_HINT_USER:
4950         case NL80211_USER_REG_HINT_CELL_BASE:
4951                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4952                         return -EINVAL;
4953
4954                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4955                 return regulatory_hint_user(data, user_reg_hint_type);
4956         case NL80211_USER_REG_HINT_INDOOR:
4957                 return regulatory_hint_indoor_user();
4958         default:
4959                 return -EINVAL;
4960         }
4961 }
4962
4963 static int nl80211_get_mesh_config(struct sk_buff *skb,
4964                                    struct genl_info *info)
4965 {
4966         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4967         struct net_device *dev = info->user_ptr[1];
4968         struct wireless_dev *wdev = dev->ieee80211_ptr;
4969         struct mesh_config cur_params;
4970         int err = 0;
4971         void *hdr;
4972         struct nlattr *pinfoattr;
4973         struct sk_buff *msg;
4974
4975         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4976                 return -EOPNOTSUPP;
4977
4978         if (!rdev->ops->get_mesh_config)
4979                 return -EOPNOTSUPP;
4980
4981         wdev_lock(wdev);
4982         /* If not connected, get default parameters */
4983         if (!wdev->mesh_id_len)
4984                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4985         else
4986                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4987         wdev_unlock(wdev);
4988
4989         if (err)
4990                 return err;
4991
4992         /* Draw up a netlink message to send back */
4993         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4994         if (!msg)
4995                 return -ENOMEM;
4996         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4997                              NL80211_CMD_GET_MESH_CONFIG);
4998         if (!hdr)
4999                 goto out;
5000         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5001         if (!pinfoattr)
5002                 goto nla_put_failure;
5003         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5004             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5005                         cur_params.dot11MeshRetryTimeout) ||
5006             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5007                         cur_params.dot11MeshConfirmTimeout) ||
5008             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5009                         cur_params.dot11MeshHoldingTimeout) ||
5010             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5011                         cur_params.dot11MeshMaxPeerLinks) ||
5012             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5013                        cur_params.dot11MeshMaxRetries) ||
5014             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5015                        cur_params.dot11MeshTTL) ||
5016             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5017                        cur_params.element_ttl) ||
5018             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5019                        cur_params.auto_open_plinks) ||
5020             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5021                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5022             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5023                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5024             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5025                         cur_params.path_refresh_time) ||
5026             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5027                         cur_params.min_discovery_timeout) ||
5028             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5029                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5030             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5031                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5032             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5033                         cur_params.dot11MeshHWMPperrMinInterval) ||
5034             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5035                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5036             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5037                        cur_params.dot11MeshHWMPRootMode) ||
5038             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5039                         cur_params.dot11MeshHWMPRannInterval) ||
5040             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5041                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5042             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5043                        cur_params.dot11MeshForwarding) ||
5044             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5045                         cur_params.rssi_threshold) ||
5046             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5047                         cur_params.ht_opmode) ||
5048             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5049                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5050             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5051                         cur_params.dot11MeshHWMProotInterval) ||
5052             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5053                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5054             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5055                         cur_params.power_mode) ||
5056             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5057                         cur_params.dot11MeshAwakeWindowDuration) ||
5058             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5059                         cur_params.plink_timeout))
5060                 goto nla_put_failure;
5061         nla_nest_end(msg, pinfoattr);
5062         genlmsg_end(msg, hdr);
5063         return genlmsg_reply(msg, info);
5064
5065  nla_put_failure:
5066         genlmsg_cancel(msg, hdr);
5067  out:
5068         nlmsg_free(msg);
5069         return -ENOBUFS;
5070 }
5071
5072 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5073         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5074         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5075         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5076         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5077         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5078         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5079         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5080         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5081         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5082         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5083         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5084         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5085         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5086         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5087         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5088         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5089         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5090         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5091         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5092         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5093         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5094         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5095         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5096         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5097         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5098         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5099         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5100         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5101 };
5102
5103 static const struct nla_policy
5104         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5105         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5106         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5107         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5108         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5109         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5110         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5111         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5112                                     .len = IEEE80211_MAX_DATA_LEN },
5113         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5114 };
5115
5116 static int nl80211_parse_mesh_config(struct genl_info *info,
5117                                      struct mesh_config *cfg,
5118                                      u32 *mask_out)
5119 {
5120         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5121         u32 mask = 0;
5122
5123 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5124 do {                                                                        \
5125         if (tb[attr]) {                                                     \
5126                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
5127                         return -EINVAL;                                     \
5128                 cfg->param = fn(tb[attr]);                                  \
5129                 mask |= (1 << (attr - 1));                                  \
5130         }                                                                   \
5131 } while (0)
5132
5133
5134         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5135                 return -EINVAL;
5136         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5137                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5138                              nl80211_meshconf_params_policy))
5139                 return -EINVAL;
5140
5141         /* This makes sure that there aren't more than 32 mesh config
5142          * parameters (otherwise our bitfield scheme would not work.) */
5143         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5144
5145         /* Fill in the params struct */
5146         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5147                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5148                                   nla_get_u16);
5149         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5150                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5151                                   nla_get_u16);
5152         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5153                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5154                                   nla_get_u16);
5155         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5156                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5157                                   nla_get_u16);
5158         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5159                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5160                                   nla_get_u8);
5161         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5162                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
5163         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5164                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5165                                   nla_get_u8);
5166         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5167                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5168                                   nla_get_u8);
5169         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5170                                   1, 255, mask,
5171                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5172                                   nla_get_u32);
5173         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5174                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5175                                   nla_get_u8);
5176         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5177                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5178                                   nla_get_u32);
5179         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5180                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5181                                   nla_get_u16);
5182         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5183                                   1, 65535, mask,
5184                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5185                                   nla_get_u32);
5186         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5187                                   1, 65535, mask,
5188                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5189                                   nla_get_u16);
5190         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5191                                   1, 65535, mask,
5192                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5193                                   nla_get_u16);
5194         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5195                                   dot11MeshHWMPnetDiameterTraversalTime,
5196                                   1, 65535, mask,
5197                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5198                                   nla_get_u16);
5199         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5200                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5201                                   nla_get_u8);
5202         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5203                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5204                                   nla_get_u16);
5205         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5206                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5207                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5208                                   nla_get_u8);
5209         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5210                                   mask, NL80211_MESHCONF_FORWARDING,
5211                                   nla_get_u8);
5212         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5213                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5214                                   nla_get_s32);
5215         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
5216                                   mask, NL80211_MESHCONF_HT_OPMODE,
5217                                   nla_get_u16);
5218         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5219                                   1, 65535, mask,
5220                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5221                                   nla_get_u32);
5222         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5223                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5224                                   nla_get_u16);
5225         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5226                                   dot11MeshHWMPconfirmationInterval,
5227                                   1, 65535, mask,
5228                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5229                                   nla_get_u16);
5230         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5231                                   NL80211_MESH_POWER_ACTIVE,
5232                                   NL80211_MESH_POWER_MAX,
5233                                   mask, NL80211_MESHCONF_POWER_MODE,
5234                                   nla_get_u32);
5235         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5236                                   0, 65535, mask,
5237                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
5238         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 1, 0xffffffff,
5239                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5240                                   nla_get_u32);
5241         if (mask_out)
5242                 *mask_out = mask;
5243
5244         return 0;
5245
5246 #undef FILL_IN_MESH_PARAM_IF_SET
5247 }
5248
5249 static int nl80211_parse_mesh_setup(struct genl_info *info,
5250                                      struct mesh_setup *setup)
5251 {
5252         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5253         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5254
5255         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5256                 return -EINVAL;
5257         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5258                              info->attrs[NL80211_ATTR_MESH_SETUP],
5259                              nl80211_mesh_setup_params_policy))
5260                 return -EINVAL;
5261
5262         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5263                 setup->sync_method =
5264                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5265                  IEEE80211_SYNC_METHOD_VENDOR :
5266                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5267
5268         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5269                 setup->path_sel_proto =
5270                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5271                  IEEE80211_PATH_PROTOCOL_VENDOR :
5272                  IEEE80211_PATH_PROTOCOL_HWMP;
5273
5274         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5275                 setup->path_metric =
5276                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5277                  IEEE80211_PATH_METRIC_VENDOR :
5278                  IEEE80211_PATH_METRIC_AIRTIME;
5279
5280
5281         if (tb[NL80211_MESH_SETUP_IE]) {
5282                 struct nlattr *ieattr =
5283                         tb[NL80211_MESH_SETUP_IE];
5284                 if (!is_valid_ie_attr(ieattr))
5285                         return -EINVAL;
5286                 setup->ie = nla_data(ieattr);
5287                 setup->ie_len = nla_len(ieattr);
5288         }
5289         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5290             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5291                 return -EINVAL;
5292         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5293         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5294         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5295         if (setup->is_secure)
5296                 setup->user_mpm = true;
5297
5298         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5299                 if (!setup->user_mpm)
5300                         return -EINVAL;
5301                 setup->auth_id =
5302                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5303         }
5304
5305         return 0;
5306 }
5307
5308 static int nl80211_update_mesh_config(struct sk_buff *skb,
5309                                       struct genl_info *info)
5310 {
5311         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5312         struct net_device *dev = info->user_ptr[1];
5313         struct wireless_dev *wdev = dev->ieee80211_ptr;
5314         struct mesh_config cfg;
5315         u32 mask;
5316         int err;
5317
5318         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5319                 return -EOPNOTSUPP;
5320
5321         if (!rdev->ops->update_mesh_config)
5322                 return -EOPNOTSUPP;
5323
5324         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5325         if (err)
5326                 return err;
5327
5328         wdev_lock(wdev);
5329         if (!wdev->mesh_id_len)
5330                 err = -ENOLINK;
5331
5332         if (!err)
5333                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5334
5335         wdev_unlock(wdev);
5336
5337         return err;
5338 }
5339
5340 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5341                               struct sk_buff *msg)
5342 {
5343         struct nlattr *nl_reg_rules;
5344         unsigned int i;
5345
5346         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5347             (regdom->dfs_region &&
5348              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5349                 goto nla_put_failure;
5350
5351         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5352         if (!nl_reg_rules)
5353                 goto nla_put_failure;
5354
5355         for (i = 0; i < regdom->n_reg_rules; i++) {
5356                 struct nlattr *nl_reg_rule;
5357                 const struct ieee80211_reg_rule *reg_rule;
5358                 const struct ieee80211_freq_range *freq_range;
5359                 const struct ieee80211_power_rule *power_rule;
5360                 unsigned int max_bandwidth_khz;
5361
5362                 reg_rule = &regdom->reg_rules[i];
5363                 freq_range = &reg_rule->freq_range;
5364                 power_rule = &reg_rule->power_rule;
5365
5366                 nl_reg_rule = nla_nest_start(msg, i);
5367                 if (!nl_reg_rule)
5368                         goto nla_put_failure;
5369
5370                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5371                 if (!max_bandwidth_khz)
5372                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5373                                                                   reg_rule);
5374
5375                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5376                                 reg_rule->flags) ||
5377                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5378                                 freq_range->start_freq_khz) ||
5379                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5380                                 freq_range->end_freq_khz) ||
5381                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5382                                 max_bandwidth_khz) ||
5383                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5384                                 power_rule->max_antenna_gain) ||
5385                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5386                                 power_rule->max_eirp) ||
5387                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5388                                 reg_rule->dfs_cac_ms))
5389                         goto nla_put_failure;
5390
5391                 nla_nest_end(msg, nl_reg_rule);
5392         }
5393
5394         nla_nest_end(msg, nl_reg_rules);
5395         return 0;
5396
5397 nla_put_failure:
5398         return -EMSGSIZE;
5399 }
5400
5401 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
5402 {
5403         const struct ieee80211_regdomain *regdom = NULL;
5404         struct cfg80211_registered_device *rdev;
5405         struct wiphy *wiphy = NULL;
5406         struct sk_buff *msg;
5407         void *hdr;
5408
5409         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5410         if (!msg)
5411                 return -ENOBUFS;
5412
5413         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5414                              NL80211_CMD_GET_REG);
5415         if (!hdr)
5416                 goto put_failure;
5417
5418         if (info->attrs[NL80211_ATTR_WIPHY]) {
5419                 bool self_managed;
5420
5421                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
5422                 if (IS_ERR(rdev)) {
5423                         nlmsg_free(msg);
5424                         return PTR_ERR(rdev);
5425                 }
5426
5427                 wiphy = &rdev->wiphy;
5428                 self_managed = wiphy->regulatory_flags &
5429                                REGULATORY_WIPHY_SELF_MANAGED;
5430                 regdom = get_wiphy_regdom(wiphy);
5431
5432                 /* a self-managed-reg device must have a private regdom */
5433                 if (WARN_ON(!regdom && self_managed)) {
5434                         nlmsg_free(msg);
5435                         return -EINVAL;
5436                 }
5437
5438                 if (regdom &&
5439                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5440                         goto nla_put_failure;
5441         }
5442
5443         if (!wiphy && reg_last_request_cell_base() &&
5444             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5445                         NL80211_USER_REG_HINT_CELL_BASE))
5446                 goto nla_put_failure;
5447
5448         rcu_read_lock();
5449
5450         if (!regdom)
5451                 regdom = rcu_dereference(cfg80211_regdomain);
5452
5453         if (nl80211_put_regdom(regdom, msg))
5454                 goto nla_put_failure_rcu;
5455
5456         rcu_read_unlock();
5457
5458         genlmsg_end(msg, hdr);
5459         return genlmsg_reply(msg, info);
5460
5461 nla_put_failure_rcu:
5462         rcu_read_unlock();
5463 nla_put_failure:
5464         genlmsg_cancel(msg, hdr);
5465 put_failure:
5466         nlmsg_free(msg);
5467         return -EMSGSIZE;
5468 }
5469
5470 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
5471                                u32 seq, int flags, struct wiphy *wiphy,
5472                                const struct ieee80211_regdomain *regdom)
5473 {
5474         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5475                                    NL80211_CMD_GET_REG);
5476
5477         if (!hdr)
5478                 return -1;
5479
5480         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5481
5482         if (nl80211_put_regdom(regdom, msg))
5483                 goto nla_put_failure;
5484
5485         if (!wiphy && reg_last_request_cell_base() &&
5486             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5487                         NL80211_USER_REG_HINT_CELL_BASE))
5488                 goto nla_put_failure;
5489
5490         if (wiphy &&
5491             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5492                 goto nla_put_failure;
5493
5494         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
5495             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
5496                 goto nla_put_failure;
5497
5498         return genlmsg_end(msg, hdr);
5499
5500 nla_put_failure:
5501         genlmsg_cancel(msg, hdr);
5502         return -EMSGSIZE;
5503 }
5504
5505 static int nl80211_get_reg_dump(struct sk_buff *skb,
5506                                 struct netlink_callback *cb)
5507 {
5508         const struct ieee80211_regdomain *regdom = NULL;
5509         struct cfg80211_registered_device *rdev;
5510         int err, reg_idx, start = cb->args[2];
5511
5512         rtnl_lock();
5513
5514         if (cfg80211_regdomain && start == 0) {
5515                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5516                                           NLM_F_MULTI, NULL,
5517                                           rtnl_dereference(cfg80211_regdomain));
5518                 if (err < 0)
5519                         goto out_err;
5520         }
5521
5522         /* the global regdom is idx 0 */
5523         reg_idx = 1;
5524         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
5525                 regdom = get_wiphy_regdom(&rdev->wiphy);
5526                 if (!regdom)
5527                         continue;
5528
5529                 if (++reg_idx <= start)
5530                         continue;
5531
5532                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5533                                           NLM_F_MULTI, &rdev->wiphy, regdom);
5534                 if (err < 0) {
5535                         reg_idx--;
5536                         break;
5537                 }
5538         }
5539
5540         cb->args[2] = reg_idx;
5541         err = skb->len;
5542 out_err:
5543         rtnl_unlock();
5544         return err;
5545 }
5546
5547 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5548 {
5549         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5550         struct nlattr *nl_reg_rule;
5551         char *alpha2;
5552         int rem_reg_rules, r;
5553         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5554         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5555         struct ieee80211_regdomain *rd;
5556
5557         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5558                 return -EINVAL;
5559
5560         if (!info->attrs[NL80211_ATTR_REG_RULES])
5561                 return -EINVAL;
5562
5563         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5564
5565         if (info->attrs[NL80211_ATTR_DFS_REGION])
5566                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5567
5568         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5569                             rem_reg_rules) {
5570                 num_rules++;
5571                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5572                         return -EINVAL;
5573         }
5574
5575         if (!reg_is_valid_request(alpha2))
5576                 return -EINVAL;
5577
5578         size_of_regd = sizeof(struct ieee80211_regdomain) +
5579                        num_rules * sizeof(struct ieee80211_reg_rule);
5580
5581         rd = kzalloc(size_of_regd, GFP_KERNEL);
5582         if (!rd)
5583                 return -ENOMEM;
5584
5585         rd->n_reg_rules = num_rules;
5586         rd->alpha2[0] = alpha2[0];
5587         rd->alpha2[1] = alpha2[1];
5588
5589         /*
5590          * Disable DFS master mode if the DFS region was
5591          * not supported or known on this kernel.
5592          */
5593         if (reg_supported_dfs_region(dfs_region))
5594                 rd->dfs_region = dfs_region;
5595
5596         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5597                             rem_reg_rules) {
5598                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5599                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5600                               reg_rule_policy);
5601                 if (r)
5602                         goto bad_reg;
5603                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5604                 if (r)
5605                         goto bad_reg;
5606
5607                 rule_idx++;
5608
5609                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5610                         r = -EINVAL;
5611                         goto bad_reg;
5612                 }
5613         }
5614
5615         r = set_regdom(rd);
5616         /* set_regdom took ownership */
5617         rd = NULL;
5618
5619  bad_reg:
5620         kfree(rd);
5621         return r;
5622 }
5623
5624 static int validate_scan_freqs(struct nlattr *freqs)
5625 {
5626         struct nlattr *attr1, *attr2;
5627         int n_channels = 0, tmp1, tmp2;
5628
5629         nla_for_each_nested(attr1, freqs, tmp1) {
5630                 n_channels++;
5631                 /*
5632                  * Some hardware has a limited channel list for
5633                  * scanning, and it is pretty much nonsensical
5634                  * to scan for a channel twice, so disallow that
5635                  * and don't require drivers to check that the
5636                  * channel list they get isn't longer than what
5637                  * they can scan, as long as they can scan all
5638                  * the channels they registered at once.
5639                  */
5640                 nla_for_each_nested(attr2, freqs, tmp2)
5641                         if (attr1 != attr2 &&
5642                             nla_get_u32(attr1) == nla_get_u32(attr2))
5643                                 return 0;
5644         }
5645
5646         return n_channels;
5647 }
5648
5649 static int nl80211_parse_random_mac(struct nlattr **attrs,
5650                                     u8 *mac_addr, u8 *mac_addr_mask)
5651 {
5652         int i;
5653
5654         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
5655                 memset(mac_addr, 0, ETH_ALEN);
5656                 memset(mac_addr_mask, 0, ETH_ALEN);
5657                 mac_addr[0] = 0x2;
5658                 mac_addr_mask[0] = 0x3;
5659
5660                 return 0;
5661         }
5662
5663         /* need both or none */
5664         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
5665                 return -EINVAL;
5666
5667         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
5668         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
5669
5670         /* don't allow or configure an mcast address */
5671         if (!is_multicast_ether_addr(mac_addr_mask) ||
5672             is_multicast_ether_addr(mac_addr))
5673                 return -EINVAL;
5674
5675         /*
5676          * allow users to pass a MAC address that has bits set outside
5677          * of the mask, but don't bother drivers with having to deal
5678          * with such bits
5679          */
5680         for (i = 0; i < ETH_ALEN; i++)
5681                 mac_addr[i] &= mac_addr_mask[i];
5682
5683         return 0;
5684 }
5685
5686 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5687 {
5688         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5689         struct wireless_dev *wdev = info->user_ptr[1];
5690         struct cfg80211_scan_request *request;
5691         struct nlattr *attr;
5692         struct wiphy *wiphy;
5693         int err, tmp, n_ssids = 0, n_channels, i;
5694         size_t ie_len;
5695
5696         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5697                 return -EINVAL;
5698
5699         wiphy = &rdev->wiphy;
5700
5701         if (!rdev->ops->scan)
5702                 return -EOPNOTSUPP;
5703
5704         if (rdev->scan_req || rdev->scan_msg) {
5705                 err = -EBUSY;
5706                 goto unlock;
5707         }
5708
5709         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5710                 n_channels = validate_scan_freqs(
5711                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5712                 if (!n_channels) {
5713                         err = -EINVAL;
5714                         goto unlock;
5715                 }
5716         } else {
5717                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5718         }
5719
5720         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5721                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5722                         n_ssids++;
5723
5724         if (n_ssids > wiphy->max_scan_ssids) {
5725                 err = -EINVAL;
5726                 goto unlock;
5727         }
5728
5729         if (info->attrs[NL80211_ATTR_IE])
5730                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5731         else
5732                 ie_len = 0;
5733
5734         if (ie_len > wiphy->max_scan_ie_len) {
5735                 err = -EINVAL;
5736                 goto unlock;
5737         }
5738
5739         request = kzalloc(sizeof(*request)
5740                         + sizeof(*request->ssids) * n_ssids
5741                         + sizeof(*request->channels) * n_channels
5742                         + ie_len, GFP_KERNEL);
5743         if (!request) {
5744                 err = -ENOMEM;
5745                 goto unlock;
5746         }
5747
5748         if (n_ssids)
5749                 request->ssids = (void *)&request->channels[n_channels];
5750         request->n_ssids = n_ssids;
5751         if (ie_len) {
5752                 if (request->ssids)
5753                         request->ie = (void *)(request->ssids + n_ssids);
5754                 else
5755                         request->ie = (void *)(request->channels + n_channels);
5756         }
5757
5758         i = 0;
5759         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5760                 /* user specified, bail out if channel not found */
5761                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5762                         struct ieee80211_channel *chan;
5763
5764                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5765
5766                         if (!chan) {
5767                                 err = -EINVAL;
5768                                 goto out_free;
5769                         }
5770
5771                         /* ignore disabled channels */
5772                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5773                                 continue;
5774
5775                         request->channels[i] = chan;
5776                         i++;
5777                 }
5778         } else {
5779                 enum ieee80211_band band;
5780
5781                 /* all channels */
5782                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5783                         int j;
5784                         if (!wiphy->bands[band])
5785                                 continue;
5786                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5787                                 struct ieee80211_channel *chan;
5788
5789                                 chan = &wiphy->bands[band]->channels[j];
5790
5791                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5792                                         continue;
5793
5794                                 request->channels[i] = chan;
5795                                 i++;
5796                         }
5797                 }
5798         }
5799
5800         if (!i) {
5801                 err = -EINVAL;
5802                 goto out_free;
5803         }
5804
5805         request->n_channels = i;
5806
5807         i = 0;
5808         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5809                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5810                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5811                                 err = -EINVAL;
5812                                 goto out_free;
5813                         }
5814                         request->ssids[i].ssid_len = nla_len(attr);
5815                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5816                         i++;
5817                 }
5818         }
5819
5820         if (info->attrs[NL80211_ATTR_IE]) {
5821                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5822                 memcpy((void *)request->ie,
5823                        nla_data(info->attrs[NL80211_ATTR_IE]),
5824                        request->ie_len);
5825         }
5826
5827         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5828                 if (wiphy->bands[i])
5829                         request->rates[i] =
5830                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5831
5832         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5833                 nla_for_each_nested(attr,
5834                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5835                                     tmp) {
5836                         enum ieee80211_band band = nla_type(attr);
5837
5838                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5839                                 err = -EINVAL;
5840                                 goto out_free;
5841                         }
5842
5843                         if (!wiphy->bands[band])
5844                                 continue;
5845
5846                         err = ieee80211_get_ratemask(wiphy->bands[band],
5847                                                      nla_data(attr),
5848                                                      nla_len(attr),
5849                                                      &request->rates[band]);
5850                         if (err)
5851                                 goto out_free;
5852                 }
5853         }
5854
5855         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5856                 request->flags = nla_get_u32(
5857                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5858                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5859                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5860                         err = -EOPNOTSUPP;
5861                         goto out_free;
5862                 }
5863
5864                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
5865                         if (!(wiphy->features &
5866                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
5867                                 err = -EOPNOTSUPP;
5868                                 goto out_free;
5869                         }
5870
5871                         if (wdev->current_bss) {
5872                                 err = -EOPNOTSUPP;
5873                                 goto out_free;
5874                         }
5875
5876                         err = nl80211_parse_random_mac(info->attrs,
5877                                                        request->mac_addr,
5878                                                        request->mac_addr_mask);
5879                         if (err)
5880                                 goto out_free;
5881                 }
5882         }
5883
5884         request->no_cck =
5885                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5886
5887         request->wdev = wdev;
5888         request->wiphy = &rdev->wiphy;
5889         request->scan_start = jiffies;
5890
5891         rdev->scan_req = request;
5892         err = rdev_scan(rdev, request);
5893
5894         if (!err) {
5895                 nl80211_send_scan_start(rdev, wdev);
5896                 if (wdev->netdev)
5897                         dev_hold(wdev->netdev);
5898         } else {
5899  out_free:
5900                 rdev->scan_req = NULL;
5901                 kfree(request);
5902         }
5903
5904  unlock:
5905         return err;
5906 }
5907
5908 static struct cfg80211_sched_scan_request *
5909 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
5910                          struct nlattr **attrs)
5911 {
5912         struct cfg80211_sched_scan_request *request;
5913         struct nlattr *attr;
5914         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5915         u32 interval;
5916         enum ieee80211_band band;
5917         size_t ie_len;
5918         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5919         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
5920
5921         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
5922                 return ERR_PTR(-EINVAL);
5923
5924         if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5925                 return ERR_PTR(-EINVAL);
5926
5927         interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5928         if (interval == 0)
5929                 return ERR_PTR(-EINVAL);
5930
5931         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5932                 n_channels = validate_scan_freqs(
5933                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5934                 if (!n_channels)
5935                         return ERR_PTR(-EINVAL);
5936         } else {
5937                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5938         }
5939
5940         if (attrs[NL80211_ATTR_SCAN_SSIDS])
5941                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
5942                                     tmp)
5943                         n_ssids++;
5944
5945         if (n_ssids > wiphy->max_sched_scan_ssids)
5946                 return ERR_PTR(-EINVAL);
5947
5948         /*
5949          * First, count the number of 'real' matchsets. Due to an issue with
5950          * the old implementation, matchsets containing only the RSSI attribute
5951          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
5952          * RSSI for all matchsets, rather than their own matchset for reporting
5953          * all APs with a strong RSSI. This is needed to be compatible with
5954          * older userspace that treated a matchset with only the RSSI as the
5955          * global RSSI for all other matchsets - if there are other matchsets.
5956          */
5957         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5958                 nla_for_each_nested(attr,
5959                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5960                                     tmp) {
5961                         struct nlattr *rssi;
5962
5963                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5964                                         nla_data(attr), nla_len(attr),
5965                                         nl80211_match_policy);
5966                         if (err)
5967                                 return ERR_PTR(err);
5968                         /* add other standalone attributes here */
5969                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
5970                                 n_match_sets++;
5971                                 continue;
5972                         }
5973                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5974                         if (rssi)
5975                                 default_match_rssi = nla_get_s32(rssi);
5976                 }
5977         }
5978
5979         /* However, if there's no other matchset, add the RSSI one */
5980         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
5981                 n_match_sets = 1;
5982
5983         if (n_match_sets > wiphy->max_match_sets)
5984                 return ERR_PTR(-EINVAL);
5985
5986         if (attrs[NL80211_ATTR_IE])
5987                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
5988         else
5989                 ie_len = 0;
5990
5991         if (ie_len > wiphy->max_sched_scan_ie_len)
5992                 return ERR_PTR(-EINVAL);
5993
5994         request = kzalloc(sizeof(*request)
5995                         + sizeof(*request->ssids) * n_ssids
5996                         + sizeof(*request->match_sets) * n_match_sets
5997                         + sizeof(*request->channels) * n_channels
5998                         + ie_len, GFP_KERNEL);
5999         if (!request)
6000                 return ERR_PTR(-ENOMEM);
6001
6002         if (n_ssids)
6003                 request->ssids = (void *)&request->channels[n_channels];
6004         request->n_ssids = n_ssids;
6005         if (ie_len) {
6006                 if (request->ssids)
6007                         request->ie = (void *)(request->ssids + n_ssids);
6008                 else
6009                         request->ie = (void *)(request->channels + n_channels);
6010         }
6011
6012         if (n_match_sets) {
6013                 if (request->ie)
6014                         request->match_sets = (void *)(request->ie + ie_len);
6015                 else if (request->ssids)
6016                         request->match_sets =
6017                                 (void *)(request->ssids + n_ssids);
6018                 else
6019                         request->match_sets =
6020                                 (void *)(request->channels + n_channels);
6021         }
6022         request->n_match_sets = n_match_sets;
6023
6024         i = 0;
6025         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6026                 /* user specified, bail out if channel not found */
6027                 nla_for_each_nested(attr,
6028                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
6029                                     tmp) {
6030                         struct ieee80211_channel *chan;
6031
6032                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6033
6034                         if (!chan) {
6035                                 err = -EINVAL;
6036                                 goto out_free;
6037                         }
6038
6039                         /* ignore disabled channels */
6040                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6041                                 continue;
6042
6043                         request->channels[i] = chan;
6044                         i++;
6045                 }
6046         } else {
6047                 /* all channels */
6048                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6049                         int j;
6050                         if (!wiphy->bands[band])
6051                                 continue;
6052                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6053                                 struct ieee80211_channel *chan;
6054
6055                                 chan = &wiphy->bands[band]->channels[j];
6056
6057                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6058                                         continue;
6059
6060                                 request->channels[i] = chan;
6061                                 i++;
6062                         }
6063                 }
6064         }
6065
6066         if (!i) {
6067                 err = -EINVAL;
6068                 goto out_free;
6069         }
6070
6071         request->n_channels = i;
6072
6073         i = 0;
6074         if (attrs[NL80211_ATTR_SCAN_SSIDS]) {
6075                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6076                                     tmp) {
6077                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6078                                 err = -EINVAL;
6079                                 goto out_free;
6080                         }
6081                         request->ssids[i].ssid_len = nla_len(attr);
6082                         memcpy(request->ssids[i].ssid, nla_data(attr),
6083                                nla_len(attr));
6084                         i++;
6085                 }
6086         }
6087
6088         i = 0;
6089         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6090                 nla_for_each_nested(attr,
6091                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6092                                     tmp) {
6093                         struct nlattr *ssid, *rssi;
6094
6095                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6096                                         nla_data(attr), nla_len(attr),
6097                                         nl80211_match_policy);
6098                         if (err)
6099                                 goto out_free;
6100                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
6101                         if (ssid) {
6102                                 if (WARN_ON(i >= n_match_sets)) {
6103                                         /* this indicates a programming error,
6104                                          * the loop above should have verified
6105                                          * things properly
6106                                          */
6107                                         err = -EINVAL;
6108                                         goto out_free;
6109                                 }
6110
6111                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
6112                                         err = -EINVAL;
6113                                         goto out_free;
6114                                 }
6115                                 memcpy(request->match_sets[i].ssid.ssid,
6116                                        nla_data(ssid), nla_len(ssid));
6117                                 request->match_sets[i].ssid.ssid_len =
6118                                         nla_len(ssid);
6119                                 /* special attribute - old implemenation w/a */
6120                                 request->match_sets[i].rssi_thold =
6121                                         default_match_rssi;
6122                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6123                                 if (rssi)
6124                                         request->match_sets[i].rssi_thold =
6125                                                 nla_get_s32(rssi);
6126                         }
6127                         i++;
6128                 }
6129
6130                 /* there was no other matchset, so the RSSI one is alone */
6131                 if (i == 0 && n_match_sets)
6132                         request->match_sets[0].rssi_thold = default_match_rssi;
6133
6134                 request->min_rssi_thold = INT_MAX;
6135                 for (i = 0; i < n_match_sets; i++)
6136                         request->min_rssi_thold =
6137                                 min(request->match_sets[i].rssi_thold,
6138                                     request->min_rssi_thold);
6139         } else {
6140                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
6141         }
6142
6143         if (ie_len) {
6144                 request->ie_len = ie_len;
6145                 memcpy((void *)request->ie,
6146                        nla_data(attrs[NL80211_ATTR_IE]),
6147                        request->ie_len);
6148         }
6149
6150         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
6151                 request->flags = nla_get_u32(
6152                         attrs[NL80211_ATTR_SCAN_FLAGS]);
6153                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6154                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6155                         err = -EOPNOTSUPP;
6156                         goto out_free;
6157                 }
6158
6159                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6160                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
6161
6162                         if (!wdev) /* must be net-detect */
6163                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6164
6165                         if (!(wiphy->features & flg)) {
6166                                 err = -EOPNOTSUPP;
6167                                 goto out_free;
6168                         }
6169
6170                         if (wdev && wdev->current_bss) {
6171                                 err = -EOPNOTSUPP;
6172                                 goto out_free;
6173                         }
6174
6175                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
6176                                                        request->mac_addr_mask);
6177                         if (err)
6178                                 goto out_free;
6179                 }
6180         }
6181
6182         request->interval = interval;
6183         request->scan_start = jiffies;
6184
6185         return request;
6186
6187 out_free:
6188         kfree(request);
6189         return ERR_PTR(err);
6190 }
6191
6192 static int nl80211_start_sched_scan(struct sk_buff *skb,
6193                                     struct genl_info *info)
6194 {
6195         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6196         struct net_device *dev = info->user_ptr[1];
6197         struct wireless_dev *wdev = dev->ieee80211_ptr;
6198         struct cfg80211_sched_scan_request *sched_scan_req;
6199         int err;
6200
6201         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6202             !rdev->ops->sched_scan_start)
6203                 return -EOPNOTSUPP;
6204
6205         if (rdev->sched_scan_req)
6206                 return -EINPROGRESS;
6207
6208         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
6209                                                   info->attrs);
6210
6211         err = PTR_ERR_OR_ZERO(sched_scan_req);
6212         if (err)
6213                 goto out_err;
6214
6215         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
6216         if (err)
6217                 goto out_free;
6218
6219         sched_scan_req->dev = dev;
6220         sched_scan_req->wiphy = &rdev->wiphy;
6221
6222         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
6223                 sched_scan_req->owner_nlportid = info->snd_portid;
6224
6225         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
6226
6227         nl80211_send_sched_scan(rdev, dev,
6228                                 NL80211_CMD_START_SCHED_SCAN);
6229         return 0;
6230
6231 out_free:
6232         kfree(sched_scan_req);
6233 out_err:
6234         return err;
6235 }
6236
6237 static int nl80211_stop_sched_scan(struct sk_buff *skb,
6238                                    struct genl_info *info)
6239 {
6240         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6241
6242         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6243             !rdev->ops->sched_scan_stop)
6244                 return -EOPNOTSUPP;
6245
6246         return __cfg80211_stop_sched_scan(rdev, false);
6247 }
6248
6249 static int nl80211_start_radar_detection(struct sk_buff *skb,
6250                                          struct genl_info *info)
6251 {
6252         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6253         struct net_device *dev = info->user_ptr[1];
6254         struct wireless_dev *wdev = dev->ieee80211_ptr;
6255         struct cfg80211_chan_def chandef;
6256         enum nl80211_dfs_regions dfs_region;
6257         unsigned int cac_time_ms;
6258         int err;
6259
6260         dfs_region = reg_get_dfs_region(wdev->wiphy);
6261         if (dfs_region == NL80211_DFS_UNSET)
6262                 return -EINVAL;
6263
6264         err = nl80211_parse_chandef(rdev, info, &chandef);
6265         if (err)
6266                 return err;
6267
6268         if (netif_carrier_ok(dev))
6269                 return -EBUSY;
6270
6271         if (wdev->cac_started)
6272                 return -EBUSY;
6273
6274         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
6275                                             wdev->iftype);
6276         if (err < 0)
6277                 return err;
6278
6279         if (err == 0)
6280                 return -EINVAL;
6281
6282         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
6283                 return -EINVAL;
6284
6285         if (!rdev->ops->start_radar_detection)
6286                 return -EOPNOTSUPP;
6287
6288         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
6289         if (WARN_ON(!cac_time_ms))
6290                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
6291
6292         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef,
6293                                                cac_time_ms);
6294         if (!err) {
6295                 wdev->chandef = chandef;
6296                 wdev->cac_started = true;
6297                 wdev->cac_start_time = jiffies;
6298                 wdev->cac_time_ms = cac_time_ms;
6299         }
6300         return err;
6301 }
6302
6303 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
6304 {
6305         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6306         struct net_device *dev = info->user_ptr[1];
6307         struct wireless_dev *wdev = dev->ieee80211_ptr;
6308         struct cfg80211_csa_settings params;
6309         /* csa_attrs is defined static to avoid waste of stack size - this
6310          * function is called under RTNL lock, so this should not be a problem.
6311          */
6312         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
6313         int err;
6314         bool need_new_beacon = false;
6315         int len, i;
6316         u32 cs_count;
6317
6318         if (!rdev->ops->channel_switch ||
6319             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
6320                 return -EOPNOTSUPP;
6321
6322         switch (dev->ieee80211_ptr->iftype) {
6323         case NL80211_IFTYPE_AP:
6324         case NL80211_IFTYPE_P2P_GO:
6325                 need_new_beacon = true;
6326
6327                 /* useless if AP is not running */
6328                 if (!wdev->beacon_interval)
6329                         return -ENOTCONN;
6330                 break;
6331         case NL80211_IFTYPE_ADHOC:
6332                 if (!wdev->ssid_len)
6333                         return -ENOTCONN;
6334                 break;
6335         case NL80211_IFTYPE_MESH_POINT:
6336                 if (!wdev->mesh_id_len)
6337                         return -ENOTCONN;
6338                 break;
6339         default:
6340                 return -EOPNOTSUPP;
6341         }
6342
6343         memset(&params, 0, sizeof(params));
6344
6345         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6346             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
6347                 return -EINVAL;
6348
6349         /* only important for AP, IBSS and mesh create IEs internally */
6350         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
6351                 return -EINVAL;
6352
6353         /* Even though the attribute is u32, the specification says
6354          * u8, so let's make sure we don't overflow.
6355          */
6356         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
6357         if (cs_count > 255)
6358                 return -EINVAL;
6359
6360         params.count = cs_count;
6361
6362         if (!need_new_beacon)
6363                 goto skip_beacons;
6364
6365         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
6366         if (err)
6367                 return err;
6368
6369         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
6370                                info->attrs[NL80211_ATTR_CSA_IES],
6371                                nl80211_policy);
6372         if (err)
6373                 return err;
6374
6375         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
6376         if (err)
6377                 return err;
6378
6379         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
6380                 return -EINVAL;
6381
6382         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6383         if (!len || (len % sizeof(u16)))
6384                 return -EINVAL;
6385
6386         params.n_counter_offsets_beacon = len / sizeof(u16);
6387         if (rdev->wiphy.max_num_csa_counters &&
6388             (params.n_counter_offsets_beacon >
6389              rdev->wiphy.max_num_csa_counters))
6390                 return -EINVAL;
6391
6392         params.counter_offsets_beacon =
6393                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6394
6395         /* sanity checks - counters should fit and be the same */
6396         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
6397                 u16 offset = params.counter_offsets_beacon[i];
6398
6399                 if (offset >= params.beacon_csa.tail_len)
6400                         return -EINVAL;
6401
6402                 if (params.beacon_csa.tail[offset] != params.count)
6403                         return -EINVAL;
6404         }
6405
6406         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
6407                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6408                 if (!len || (len % sizeof(u16)))
6409                         return -EINVAL;
6410
6411                 params.n_counter_offsets_presp = len / sizeof(u16);
6412                 if (rdev->wiphy.max_num_csa_counters &&
6413                     (params.n_counter_offsets_beacon >
6414                      rdev->wiphy.max_num_csa_counters))
6415                         return -EINVAL;
6416
6417                 params.counter_offsets_presp =
6418                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6419
6420                 /* sanity checks - counters should fit and be the same */
6421                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
6422                         u16 offset = params.counter_offsets_presp[i];
6423
6424                         if (offset >= params.beacon_csa.probe_resp_len)
6425                                 return -EINVAL;
6426
6427                         if (params.beacon_csa.probe_resp[offset] !=
6428                             params.count)
6429                                 return -EINVAL;
6430                 }
6431         }
6432
6433 skip_beacons:
6434         err = nl80211_parse_chandef(rdev, info, &params.chandef);
6435         if (err)
6436                 return err;
6437
6438         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef,
6439                                      wdev->iftype))
6440                 return -EINVAL;
6441
6442         err = cfg80211_chandef_dfs_required(wdev->wiphy,
6443                                             &params.chandef,
6444                                             wdev->iftype);
6445         if (err < 0)
6446                 return err;
6447
6448         if (err > 0)
6449                 params.radar_required = true;
6450
6451         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
6452                 params.block_tx = true;
6453
6454         wdev_lock(wdev);
6455         err = rdev_channel_switch(rdev, dev, &params);
6456         wdev_unlock(wdev);
6457
6458         return err;
6459 }
6460
6461 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
6462                             u32 seq, int flags,
6463                             struct cfg80211_registered_device *rdev,
6464                             struct wireless_dev *wdev,
6465                             struct cfg80211_internal_bss *intbss)
6466 {
6467         struct cfg80211_bss *res = &intbss->pub;
6468         const struct cfg80211_bss_ies *ies;
6469         void *hdr;
6470         struct nlattr *bss;
6471
6472         ASSERT_WDEV_LOCK(wdev);
6473
6474         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6475                              NL80211_CMD_NEW_SCAN_RESULTS);
6476         if (!hdr)
6477                 return -1;
6478
6479         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6480
6481         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
6482                 goto nla_put_failure;
6483         if (wdev->netdev &&
6484             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
6485                 goto nla_put_failure;
6486         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
6487                 goto nla_put_failure;
6488
6489         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
6490         if (!bss)
6491                 goto nla_put_failure;
6492         if ((!is_zero_ether_addr(res->bssid) &&
6493              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
6494                 goto nla_put_failure;
6495
6496         rcu_read_lock();
6497         /* indicate whether we have probe response data or not */
6498         if (rcu_access_pointer(res->proberesp_ies) &&
6499             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
6500                 goto fail_unlock_rcu;
6501
6502         /* this pointer prefers to be pointed to probe response data
6503          * but is always valid
6504          */
6505         ies = rcu_dereference(res->ies);
6506         if (ies) {
6507                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
6508                         goto fail_unlock_rcu;
6509                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
6510                                         ies->len, ies->data))
6511                         goto fail_unlock_rcu;
6512         }
6513
6514         /* and this pointer is always (unless driver didn't know) beacon data */
6515         ies = rcu_dereference(res->beacon_ies);
6516         if (ies && ies->from_beacon) {
6517                 if (nla_put_u64(msg, NL80211_BSS_BEACON_TSF, ies->tsf))
6518                         goto fail_unlock_rcu;
6519                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
6520                                         ies->len, ies->data))
6521                         goto fail_unlock_rcu;
6522         }
6523         rcu_read_unlock();
6524
6525         if (res->beacon_interval &&
6526             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
6527                 goto nla_put_failure;
6528         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
6529             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
6530             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
6531             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
6532                         jiffies_to_msecs(jiffies - intbss->ts)))
6533                 goto nla_put_failure;
6534
6535         switch (rdev->wiphy.signal_type) {
6536         case CFG80211_SIGNAL_TYPE_MBM:
6537                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
6538                         goto nla_put_failure;
6539                 break;
6540         case CFG80211_SIGNAL_TYPE_UNSPEC:
6541                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
6542                         goto nla_put_failure;
6543                 break;
6544         default:
6545                 break;
6546         }
6547
6548         switch (wdev->iftype) {
6549         case NL80211_IFTYPE_P2P_CLIENT:
6550         case NL80211_IFTYPE_STATION:
6551                 if (intbss == wdev->current_bss &&
6552                     nla_put_u32(msg, NL80211_BSS_STATUS,
6553                                 NL80211_BSS_STATUS_ASSOCIATED))
6554                         goto nla_put_failure;
6555                 break;
6556         case NL80211_IFTYPE_ADHOC:
6557                 if (intbss == wdev->current_bss &&
6558                     nla_put_u32(msg, NL80211_BSS_STATUS,
6559                                 NL80211_BSS_STATUS_IBSS_JOINED))
6560                         goto nla_put_failure;
6561                 break;
6562         default:
6563                 break;
6564         }
6565
6566         nla_nest_end(msg, bss);
6567
6568         return genlmsg_end(msg, hdr);
6569
6570  fail_unlock_rcu:
6571         rcu_read_unlock();
6572  nla_put_failure:
6573         genlmsg_cancel(msg, hdr);
6574         return -EMSGSIZE;
6575 }
6576
6577 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
6578 {
6579         struct cfg80211_registered_device *rdev;
6580         struct cfg80211_internal_bss *scan;
6581         struct wireless_dev *wdev;
6582         int start = cb->args[2], idx = 0;
6583         int err;
6584
6585         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6586         if (err)
6587                 return err;
6588
6589         wdev_lock(wdev);
6590         spin_lock_bh(&rdev->bss_lock);
6591         cfg80211_bss_expire(rdev);
6592
6593         cb->seq = rdev->bss_generation;
6594
6595         list_for_each_entry(scan, &rdev->bss_list, list) {
6596                 if (++idx <= start)
6597                         continue;
6598                 if (nl80211_send_bss(skb, cb,
6599                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6600                                 rdev, wdev, scan) < 0) {
6601                         idx--;
6602                         break;
6603                 }
6604         }
6605
6606         spin_unlock_bh(&rdev->bss_lock);
6607         wdev_unlock(wdev);
6608
6609         cb->args[2] = idx;
6610         nl80211_finish_wdev_dump(rdev);
6611
6612         return skb->len;
6613 }
6614
6615 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
6616                                 int flags, struct net_device *dev,
6617                                 struct survey_info *survey)
6618 {
6619         void *hdr;
6620         struct nlattr *infoattr;
6621
6622         hdr = nl80211hdr_put(msg, portid, seq, flags,
6623                              NL80211_CMD_NEW_SURVEY_RESULTS);
6624         if (!hdr)
6625                 return -ENOMEM;
6626
6627         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
6628                 goto nla_put_failure;
6629
6630         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
6631         if (!infoattr)
6632                 goto nla_put_failure;
6633
6634         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
6635                         survey->channel->center_freq))
6636                 goto nla_put_failure;
6637
6638         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
6639             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
6640                 goto nla_put_failure;
6641         if ((survey->filled & SURVEY_INFO_IN_USE) &&
6642             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
6643                 goto nla_put_failure;
6644         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
6645             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
6646                         survey->channel_time))
6647                 goto nla_put_failure;
6648         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
6649             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
6650                         survey->channel_time_busy))
6651                 goto nla_put_failure;
6652         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
6653             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
6654                         survey->channel_time_ext_busy))
6655                 goto nla_put_failure;
6656         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
6657             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
6658                         survey->channel_time_rx))
6659                 goto nla_put_failure;
6660         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
6661             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
6662                         survey->channel_time_tx))
6663                 goto nla_put_failure;
6664
6665         nla_nest_end(msg, infoattr);
6666
6667         return genlmsg_end(msg, hdr);
6668
6669  nla_put_failure:
6670         genlmsg_cancel(msg, hdr);
6671         return -EMSGSIZE;
6672 }
6673
6674 static int nl80211_dump_survey(struct sk_buff *skb,
6675                         struct netlink_callback *cb)
6676 {
6677         struct survey_info survey;
6678         struct cfg80211_registered_device *rdev;
6679         struct wireless_dev *wdev;
6680         int survey_idx = cb->args[2];
6681         int res;
6682
6683         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6684         if (res)
6685                 return res;
6686
6687         if (!wdev->netdev) {
6688                 res = -EINVAL;
6689                 goto out_err;
6690         }
6691
6692         if (!rdev->ops->dump_survey) {
6693                 res = -EOPNOTSUPP;
6694                 goto out_err;
6695         }
6696
6697         while (1) {
6698                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
6699                 if (res == -ENOENT)
6700                         break;
6701                 if (res)
6702                         goto out_err;
6703
6704                 /* Survey without a channel doesn't make sense */
6705                 if (!survey.channel) {
6706                         res = -EINVAL;
6707                         goto out;
6708                 }
6709
6710                 if (survey.channel->flags & IEEE80211_CHAN_DISABLED) {
6711                         survey_idx++;
6712                         continue;
6713                 }
6714
6715                 if (nl80211_send_survey(skb,
6716                                 NETLINK_CB(cb->skb).portid,
6717                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6718                                 wdev->netdev, &survey) < 0)
6719                         goto out;
6720                 survey_idx++;
6721         }
6722
6723  out:
6724         cb->args[2] = survey_idx;
6725         res = skb->len;
6726  out_err:
6727         nl80211_finish_wdev_dump(rdev);
6728         return res;
6729 }
6730
6731 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
6732 {
6733         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
6734                                   NL80211_WPA_VERSION_2));
6735 }
6736
6737 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
6738 {
6739         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6740         struct net_device *dev = info->user_ptr[1];
6741         struct ieee80211_channel *chan;
6742         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
6743         int err, ssid_len, ie_len = 0, sae_data_len = 0;
6744         enum nl80211_auth_type auth_type;
6745         struct key_parse key;
6746         bool local_state_change;
6747
6748         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6749                 return -EINVAL;
6750
6751         if (!info->attrs[NL80211_ATTR_MAC])
6752                 return -EINVAL;
6753
6754         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
6755                 return -EINVAL;
6756
6757         if (!info->attrs[NL80211_ATTR_SSID])
6758                 return -EINVAL;
6759
6760         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
6761                 return -EINVAL;
6762
6763         err = nl80211_parse_key(info, &key);
6764         if (err)
6765                 return err;
6766
6767         if (key.idx >= 0) {
6768                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
6769                         return -EINVAL;
6770                 if (!key.p.key || !key.p.key_len)
6771                         return -EINVAL;
6772                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
6773                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
6774                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
6775                      key.p.key_len != WLAN_KEY_LEN_WEP104))
6776                         return -EINVAL;
6777                 if (key.idx > 4)
6778                         return -EINVAL;
6779         } else {
6780                 key.p.key_len = 0;
6781                 key.p.key = NULL;
6782         }
6783
6784         if (key.idx >= 0) {
6785                 int i;
6786                 bool ok = false;
6787                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
6788                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
6789                                 ok = true;
6790                                 break;
6791                         }
6792                 }
6793                 if (!ok)
6794                         return -EINVAL;
6795         }
6796
6797         if (!rdev->ops->auth)
6798                 return -EOPNOTSUPP;
6799
6800         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6801             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6802                 return -EOPNOTSUPP;
6803
6804         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6805         chan = nl80211_get_valid_chan(&rdev->wiphy,
6806                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6807         if (!chan)
6808                 return -EINVAL;
6809
6810         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6811         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6812
6813         if (info->attrs[NL80211_ATTR_IE]) {
6814                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6815                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6816         }
6817
6818         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6819         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
6820                 return -EINVAL;
6821
6822         if (auth_type == NL80211_AUTHTYPE_SAE &&
6823             !info->attrs[NL80211_ATTR_SAE_DATA])
6824                 return -EINVAL;
6825
6826         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
6827                 if (auth_type != NL80211_AUTHTYPE_SAE)
6828                         return -EINVAL;
6829                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
6830                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
6831                 /* need to include at least Auth Transaction and Status Code */
6832                 if (sae_data_len < 4)
6833                         return -EINVAL;
6834         }
6835
6836         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6837
6838         /*
6839          * Since we no longer track auth state, ignore
6840          * requests to only change local state.
6841          */
6842         if (local_state_change)
6843                 return 0;
6844
6845         wdev_lock(dev->ieee80211_ptr);
6846         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
6847                                  ssid, ssid_len, ie, ie_len,
6848                                  key.p.key, key.p.key_len, key.idx,
6849                                  sae_data, sae_data_len);
6850         wdev_unlock(dev->ieee80211_ptr);
6851         return err;
6852 }
6853
6854 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
6855                                    struct genl_info *info,
6856                                    struct cfg80211_crypto_settings *settings,
6857                                    int cipher_limit)
6858 {
6859         memset(settings, 0, sizeof(*settings));
6860
6861         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
6862
6863         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
6864                 u16 proto;
6865                 proto = nla_get_u16(
6866                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
6867                 settings->control_port_ethertype = cpu_to_be16(proto);
6868                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
6869                     proto != ETH_P_PAE)
6870                         return -EINVAL;
6871                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
6872                         settings->control_port_no_encrypt = true;
6873         } else
6874                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
6875
6876         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
6877                 void *data;
6878                 int len, i;
6879
6880                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6881                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6882                 settings->n_ciphers_pairwise = len / sizeof(u32);
6883
6884                 if (len % sizeof(u32))
6885                         return -EINVAL;
6886
6887                 if (settings->n_ciphers_pairwise > cipher_limit)
6888                         return -EINVAL;
6889
6890                 memcpy(settings->ciphers_pairwise, data, len);
6891
6892                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
6893                         if (!cfg80211_supported_cipher_suite(
6894                                         &rdev->wiphy,
6895                                         settings->ciphers_pairwise[i]))
6896                                 return -EINVAL;
6897         }
6898
6899         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
6900                 settings->cipher_group =
6901                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
6902                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
6903                                                      settings->cipher_group))
6904                         return -EINVAL;
6905         }
6906
6907         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
6908                 settings->wpa_versions =
6909                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
6910                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
6911                         return -EINVAL;
6912         }
6913
6914         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
6915                 void *data;
6916                 int len;
6917
6918                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
6919                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
6920                 settings->n_akm_suites = len / sizeof(u32);
6921
6922                 if (len % sizeof(u32))
6923                         return -EINVAL;
6924
6925                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6926                         return -EINVAL;
6927
6928                 memcpy(settings->akm_suites, data, len);
6929         }
6930
6931         return 0;
6932 }
6933
6934 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6935 {
6936         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6937         struct net_device *dev = info->user_ptr[1];
6938         struct ieee80211_channel *chan;
6939         struct cfg80211_assoc_request req = {};
6940         const u8 *bssid, *ssid;
6941         int err, ssid_len = 0;
6942
6943         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6944                 return -EINVAL;
6945
6946         if (!info->attrs[NL80211_ATTR_MAC] ||
6947             !info->attrs[NL80211_ATTR_SSID] ||
6948             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6949                 return -EINVAL;
6950
6951         if (!rdev->ops->assoc)
6952                 return -EOPNOTSUPP;
6953
6954         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6955             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6956                 return -EOPNOTSUPP;
6957
6958         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6959
6960         chan = nl80211_get_valid_chan(&rdev->wiphy,
6961                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6962         if (!chan)
6963                 return -EINVAL;
6964
6965         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6966         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6967
6968         if (info->attrs[NL80211_ATTR_IE]) {
6969                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6970                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6971         }
6972
6973         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6974                 enum nl80211_mfp mfp =
6975                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6976                 if (mfp == NL80211_MFP_REQUIRED)
6977                         req.use_mfp = true;
6978                 else if (mfp != NL80211_MFP_NO)
6979                         return -EINVAL;
6980         }
6981
6982         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6983                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6984
6985         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6986                 req.flags |= ASSOC_REQ_DISABLE_HT;
6987
6988         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6989                 memcpy(&req.ht_capa_mask,
6990                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6991                        sizeof(req.ht_capa_mask));
6992
6993         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6994                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6995                         return -EINVAL;
6996                 memcpy(&req.ht_capa,
6997                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6998                        sizeof(req.ht_capa));
6999         }
7000
7001         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7002                 req.flags |= ASSOC_REQ_DISABLE_VHT;
7003
7004         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7005                 memcpy(&req.vht_capa_mask,
7006                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7007                        sizeof(req.vht_capa_mask));
7008
7009         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7010                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7011                         return -EINVAL;
7012                 memcpy(&req.vht_capa,
7013                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7014                        sizeof(req.vht_capa));
7015         }
7016
7017         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7018                 if (!(rdev->wiphy.features &
7019                       NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) ||
7020                     !(rdev->wiphy.features & NL80211_FEATURE_QUIET))
7021                         return -EINVAL;
7022                 req.flags |= ASSOC_REQ_USE_RRM;
7023         }
7024
7025         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
7026         if (!err) {
7027                 wdev_lock(dev->ieee80211_ptr);
7028                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
7029                                           ssid, ssid_len, &req);
7030                 wdev_unlock(dev->ieee80211_ptr);
7031         }
7032
7033         return err;
7034 }
7035
7036 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
7037 {
7038         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7039         struct net_device *dev = info->user_ptr[1];
7040         const u8 *ie = NULL, *bssid;
7041         int ie_len = 0, err;
7042         u16 reason_code;
7043         bool local_state_change;
7044
7045         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7046                 return -EINVAL;
7047
7048         if (!info->attrs[NL80211_ATTR_MAC])
7049                 return -EINVAL;
7050
7051         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7052                 return -EINVAL;
7053
7054         if (!rdev->ops->deauth)
7055                 return -EOPNOTSUPP;
7056
7057         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7058             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7059                 return -EOPNOTSUPP;
7060
7061         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7062
7063         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7064         if (reason_code == 0) {
7065                 /* Reason Code 0 is reserved */
7066                 return -EINVAL;
7067         }
7068
7069         if (info->attrs[NL80211_ATTR_IE]) {
7070                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7071                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7072         }
7073
7074         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7075
7076         wdev_lock(dev->ieee80211_ptr);
7077         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
7078                                    local_state_change);
7079         wdev_unlock(dev->ieee80211_ptr);
7080         return err;
7081 }
7082
7083 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
7084 {
7085         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7086         struct net_device *dev = info->user_ptr[1];
7087         const u8 *ie = NULL, *bssid;
7088         int ie_len = 0, err;
7089         u16 reason_code;
7090         bool local_state_change;
7091
7092         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7093                 return -EINVAL;
7094
7095         if (!info->attrs[NL80211_ATTR_MAC])
7096                 return -EINVAL;
7097
7098         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7099                 return -EINVAL;
7100
7101         if (!rdev->ops->disassoc)
7102                 return -EOPNOTSUPP;
7103
7104         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7105             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7106                 return -EOPNOTSUPP;
7107
7108         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7109
7110         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7111         if (reason_code == 0) {
7112                 /* Reason Code 0 is reserved */
7113                 return -EINVAL;
7114         }
7115
7116         if (info->attrs[NL80211_ATTR_IE]) {
7117                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7118                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7119         }
7120
7121         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7122
7123         wdev_lock(dev->ieee80211_ptr);
7124         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
7125                                      local_state_change);
7126         wdev_unlock(dev->ieee80211_ptr);
7127         return err;
7128 }
7129
7130 static bool
7131 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
7132                          int mcast_rate[IEEE80211_NUM_BANDS],
7133                          int rateval)
7134 {
7135         struct wiphy *wiphy = &rdev->wiphy;
7136         bool found = false;
7137         int band, i;
7138
7139         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
7140                 struct ieee80211_supported_band *sband;
7141
7142                 sband = wiphy->bands[band];
7143                 if (!sband)
7144                         continue;
7145
7146                 for (i = 0; i < sband->n_bitrates; i++) {
7147                         if (sband->bitrates[i].bitrate == rateval) {
7148                                 mcast_rate[band] = i + 1;
7149                                 found = true;
7150                                 break;
7151                         }
7152                 }
7153         }
7154
7155         return found;
7156 }
7157
7158 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
7159 {
7160         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7161         struct net_device *dev = info->user_ptr[1];
7162         struct cfg80211_ibss_params ibss;
7163         struct wiphy *wiphy;
7164         struct cfg80211_cached_keys *connkeys = NULL;
7165         int err;
7166
7167         memset(&ibss, 0, sizeof(ibss));
7168
7169         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7170                 return -EINVAL;
7171
7172         if (!info->attrs[NL80211_ATTR_SSID] ||
7173             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7174                 return -EINVAL;
7175
7176         ibss.beacon_interval = 100;
7177
7178         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7179                 ibss.beacon_interval =
7180                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7181                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
7182                         return -EINVAL;
7183         }
7184
7185         if (!rdev->ops->join_ibss)
7186                 return -EOPNOTSUPP;
7187
7188         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7189                 return -EOPNOTSUPP;
7190
7191         wiphy = &rdev->wiphy;
7192
7193         if (info->attrs[NL80211_ATTR_MAC]) {
7194                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7195
7196                 if (!is_valid_ether_addr(ibss.bssid))
7197                         return -EINVAL;
7198         }
7199         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7200         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7201
7202         if (info->attrs[NL80211_ATTR_IE]) {
7203                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7204                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7205         }
7206
7207         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
7208         if (err)
7209                 return err;
7210
7211         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
7212                                      NL80211_IFTYPE_ADHOC))
7213                 return -EINVAL;
7214
7215         switch (ibss.chandef.width) {
7216         case NL80211_CHAN_WIDTH_5:
7217         case NL80211_CHAN_WIDTH_10:
7218         case NL80211_CHAN_WIDTH_20_NOHT:
7219                 break;
7220         case NL80211_CHAN_WIDTH_20:
7221         case NL80211_CHAN_WIDTH_40:
7222                 if (rdev->wiphy.features & NL80211_FEATURE_HT_IBSS)
7223                         break;
7224         default:
7225                 return -EINVAL;
7226         }
7227
7228         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
7229         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
7230
7231         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7232                 u8 *rates =
7233                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7234                 int n_rates =
7235                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7236                 struct ieee80211_supported_band *sband =
7237                         wiphy->bands[ibss.chandef.chan->band];
7238
7239                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7240                                              &ibss.basic_rates);
7241                 if (err)
7242                         return err;
7243         }
7244
7245         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7246                 memcpy(&ibss.ht_capa_mask,
7247                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7248                        sizeof(ibss.ht_capa_mask));
7249
7250         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7251                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7252                         return -EINVAL;
7253                 memcpy(&ibss.ht_capa,
7254                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7255                        sizeof(ibss.ht_capa));
7256         }
7257
7258         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7259             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
7260                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7261                 return -EINVAL;
7262
7263         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7264                 bool no_ht = false;
7265
7266                 connkeys = nl80211_parse_connkeys(rdev,
7267                                           info->attrs[NL80211_ATTR_KEYS],
7268                                           &no_ht);
7269                 if (IS_ERR(connkeys))
7270                         return PTR_ERR(connkeys);
7271
7272                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
7273                     no_ht) {
7274                         kfree(connkeys);
7275                         return -EINVAL;
7276                 }
7277         }
7278
7279         ibss.control_port =
7280                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
7281
7282         ibss.userspace_handles_dfs =
7283                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
7284
7285         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
7286         if (err)
7287                 kzfree(connkeys);
7288         return err;
7289 }
7290
7291 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
7292 {
7293         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7294         struct net_device *dev = info->user_ptr[1];
7295
7296         if (!rdev->ops->leave_ibss)
7297                 return -EOPNOTSUPP;
7298
7299         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7300                 return -EOPNOTSUPP;
7301
7302         return cfg80211_leave_ibss(rdev, dev, false);
7303 }
7304
7305 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
7306 {
7307         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7308         struct net_device *dev = info->user_ptr[1];
7309         int mcast_rate[IEEE80211_NUM_BANDS];
7310         u32 nla_rate;
7311         int err;
7312
7313         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
7314             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
7315                 return -EOPNOTSUPP;
7316
7317         if (!rdev->ops->set_mcast_rate)
7318                 return -EOPNOTSUPP;
7319
7320         memset(mcast_rate, 0, sizeof(mcast_rate));
7321
7322         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
7323                 return -EINVAL;
7324
7325         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
7326         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
7327                 return -EINVAL;
7328
7329         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
7330
7331         return err;
7332 }
7333
7334 static struct sk_buff *
7335 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
7336                             int approxlen, u32 portid, u32 seq,
7337                             enum nl80211_commands cmd,
7338                             enum nl80211_attrs attr,
7339                             const struct nl80211_vendor_cmd_info *info,
7340                             gfp_t gfp)
7341 {
7342         struct sk_buff *skb;
7343         void *hdr;
7344         struct nlattr *data;
7345
7346         skb = nlmsg_new(approxlen + 100, gfp);
7347         if (!skb)
7348                 return NULL;
7349
7350         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
7351         if (!hdr) {
7352                 kfree_skb(skb);
7353                 return NULL;
7354         }
7355
7356         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
7357                 goto nla_put_failure;
7358
7359         if (info) {
7360                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
7361                                 info->vendor_id))
7362                         goto nla_put_failure;
7363                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
7364                                 info->subcmd))
7365                         goto nla_put_failure;
7366         }
7367
7368         data = nla_nest_start(skb, attr);
7369
7370         ((void **)skb->cb)[0] = rdev;
7371         ((void **)skb->cb)[1] = hdr;
7372         ((void **)skb->cb)[2] = data;
7373
7374         return skb;
7375
7376  nla_put_failure:
7377         kfree_skb(skb);
7378         return NULL;
7379 }
7380
7381 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
7382                                            enum nl80211_commands cmd,
7383                                            enum nl80211_attrs attr,
7384                                            int vendor_event_idx,
7385                                            int approxlen, gfp_t gfp)
7386 {
7387         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
7388         const struct nl80211_vendor_cmd_info *info;
7389
7390         switch (cmd) {
7391         case NL80211_CMD_TESTMODE:
7392                 if (WARN_ON(vendor_event_idx != -1))
7393                         return NULL;
7394                 info = NULL;
7395                 break;
7396         case NL80211_CMD_VENDOR:
7397                 if (WARN_ON(vendor_event_idx < 0 ||
7398                             vendor_event_idx >= wiphy->n_vendor_events))
7399                         return NULL;
7400                 info = &wiphy->vendor_events[vendor_event_idx];
7401                 break;
7402         default:
7403                 WARN_ON(1);
7404                 return NULL;
7405         }
7406
7407         return __cfg80211_alloc_vendor_skb(rdev, approxlen, 0, 0,
7408                                            cmd, attr, info, gfp);
7409 }
7410 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
7411
7412 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
7413 {
7414         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
7415         void *hdr = ((void **)skb->cb)[1];
7416         struct nlattr *data = ((void **)skb->cb)[2];
7417         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
7418
7419         /* clear CB data for netlink core to own from now on */
7420         memset(skb->cb, 0, sizeof(skb->cb));
7421
7422         nla_nest_end(skb, data);
7423         genlmsg_end(skb, hdr);
7424
7425         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
7426                 mcgrp = NL80211_MCGRP_VENDOR;
7427
7428         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
7429                                 mcgrp, gfp);
7430 }
7431 EXPORT_SYMBOL(__cfg80211_send_event_skb);
7432
7433 #ifdef CONFIG_NL80211_TESTMODE
7434 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
7435 {
7436         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7437         struct wireless_dev *wdev =
7438                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
7439         int err;
7440
7441         if (!rdev->ops->testmode_cmd)
7442                 return -EOPNOTSUPP;
7443
7444         if (IS_ERR(wdev)) {
7445                 err = PTR_ERR(wdev);
7446                 if (err != -EINVAL)
7447                         return err;
7448                 wdev = NULL;
7449         } else if (wdev->wiphy != &rdev->wiphy) {
7450                 return -EINVAL;
7451         }
7452
7453         if (!info->attrs[NL80211_ATTR_TESTDATA])
7454                 return -EINVAL;
7455
7456         rdev->cur_cmd_info = info;
7457         err = rdev_testmode_cmd(rdev, wdev,
7458                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
7459                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
7460         rdev->cur_cmd_info = NULL;
7461
7462         return err;
7463 }
7464
7465 static int nl80211_testmode_dump(struct sk_buff *skb,
7466                                  struct netlink_callback *cb)
7467 {
7468         struct cfg80211_registered_device *rdev;
7469         int err;
7470         long phy_idx;
7471         void *data = NULL;
7472         int data_len = 0;
7473
7474         rtnl_lock();
7475
7476         if (cb->args[0]) {
7477                 /*
7478                  * 0 is a valid index, but not valid for args[0],
7479                  * so we need to offset by 1.
7480                  */
7481                 phy_idx = cb->args[0] - 1;
7482         } else {
7483                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
7484                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
7485                                   nl80211_policy);
7486                 if (err)
7487                         goto out_err;
7488
7489                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
7490                                                   nl80211_fam.attrbuf);
7491                 if (IS_ERR(rdev)) {
7492                         err = PTR_ERR(rdev);
7493                         goto out_err;
7494                 }
7495                 phy_idx = rdev->wiphy_idx;
7496                 rdev = NULL;
7497
7498                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
7499                         cb->args[1] =
7500                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
7501         }
7502
7503         if (cb->args[1]) {
7504                 data = nla_data((void *)cb->args[1]);
7505                 data_len = nla_len((void *)cb->args[1]);
7506         }
7507
7508         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
7509         if (!rdev) {
7510                 err = -ENOENT;
7511                 goto out_err;
7512         }
7513
7514         if (!rdev->ops->testmode_dump) {
7515                 err = -EOPNOTSUPP;
7516                 goto out_err;
7517         }
7518
7519         while (1) {
7520                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
7521                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
7522                                            NL80211_CMD_TESTMODE);
7523                 struct nlattr *tmdata;
7524
7525                 if (!hdr)
7526                         break;
7527
7528                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
7529                         genlmsg_cancel(skb, hdr);
7530                         break;
7531                 }
7532
7533                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
7534                 if (!tmdata) {
7535                         genlmsg_cancel(skb, hdr);
7536                         break;
7537                 }
7538                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
7539                 nla_nest_end(skb, tmdata);
7540
7541                 if (err == -ENOBUFS || err == -ENOENT) {
7542                         genlmsg_cancel(skb, hdr);
7543                         break;
7544                 } else if (err) {
7545                         genlmsg_cancel(skb, hdr);
7546                         goto out_err;
7547                 }
7548
7549                 genlmsg_end(skb, hdr);
7550         }
7551
7552         err = skb->len;
7553         /* see above */
7554         cb->args[0] = phy_idx + 1;
7555  out_err:
7556         rtnl_unlock();
7557         return err;
7558 }
7559 #endif
7560
7561 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
7562 {
7563         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7564         struct net_device *dev = info->user_ptr[1];
7565         struct cfg80211_connect_params connect;
7566         struct wiphy *wiphy;
7567         struct cfg80211_cached_keys *connkeys = NULL;
7568         int err;
7569
7570         memset(&connect, 0, sizeof(connect));
7571
7572         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7573                 return -EINVAL;
7574
7575         if (!info->attrs[NL80211_ATTR_SSID] ||
7576             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7577                 return -EINVAL;
7578
7579         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
7580                 connect.auth_type =
7581                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7582                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
7583                                              NL80211_CMD_CONNECT))
7584                         return -EINVAL;
7585         } else
7586                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
7587
7588         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
7589
7590         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
7591                                       NL80211_MAX_NR_CIPHER_SUITES);
7592         if (err)
7593                 return err;
7594
7595         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7596             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7597                 return -EOPNOTSUPP;
7598
7599         wiphy = &rdev->wiphy;
7600
7601         connect.bg_scan_period = -1;
7602         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
7603                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
7604                 connect.bg_scan_period =
7605                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
7606         }
7607
7608         if (info->attrs[NL80211_ATTR_MAC])
7609                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7610         else if (info->attrs[NL80211_ATTR_MAC_HINT])
7611                 connect.bssid_hint =
7612                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
7613         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7614         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7615
7616         if (info->attrs[NL80211_ATTR_IE]) {
7617                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7618                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7619         }
7620
7621         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7622                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7623                 if (connect.mfp != NL80211_MFP_REQUIRED &&
7624                     connect.mfp != NL80211_MFP_NO)
7625                         return -EINVAL;
7626         } else {
7627                 connect.mfp = NL80211_MFP_NO;
7628         }
7629
7630         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7631                 connect.channel = nl80211_get_valid_chan(
7632                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7633                 if (!connect.channel)
7634                         return -EINVAL;
7635         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
7636                 connect.channel_hint = nl80211_get_valid_chan(
7637                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
7638                 if (!connect.channel_hint)
7639                         return -EINVAL;
7640         }
7641
7642         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7643                 connkeys = nl80211_parse_connkeys(rdev,
7644                                           info->attrs[NL80211_ATTR_KEYS], NULL);
7645                 if (IS_ERR(connkeys))
7646                         return PTR_ERR(connkeys);
7647         }
7648
7649         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7650                 connect.flags |= ASSOC_REQ_DISABLE_HT;
7651
7652         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7653                 memcpy(&connect.ht_capa_mask,
7654                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7655                        sizeof(connect.ht_capa_mask));
7656
7657         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7658                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
7659                         kzfree(connkeys);
7660                         return -EINVAL;
7661                 }
7662                 memcpy(&connect.ht_capa,
7663                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7664                        sizeof(connect.ht_capa));
7665         }
7666
7667         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7668                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
7669
7670         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7671                 memcpy(&connect.vht_capa_mask,
7672                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7673                        sizeof(connect.vht_capa_mask));
7674
7675         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7676                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
7677                         kzfree(connkeys);
7678                         return -EINVAL;
7679                 }
7680                 memcpy(&connect.vht_capa,
7681                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7682                        sizeof(connect.vht_capa));
7683         }
7684
7685         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7686                 if (!(rdev->wiphy.features &
7687                       NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) ||
7688                     !(rdev->wiphy.features & NL80211_FEATURE_QUIET))
7689                         return -EINVAL;
7690                 connect.flags |= ASSOC_REQ_USE_RRM;
7691         }
7692
7693         wdev_lock(dev->ieee80211_ptr);
7694         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
7695         wdev_unlock(dev->ieee80211_ptr);
7696         if (err)
7697                 kzfree(connkeys);
7698         return err;
7699 }
7700
7701 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
7702 {
7703         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7704         struct net_device *dev = info->user_ptr[1];
7705         u16 reason;
7706         int ret;
7707
7708         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7709                 reason = WLAN_REASON_DEAUTH_LEAVING;
7710         else
7711                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7712
7713         if (reason == 0)
7714                 return -EINVAL;
7715
7716         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7717             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7718                 return -EOPNOTSUPP;
7719
7720         wdev_lock(dev->ieee80211_ptr);
7721         ret = cfg80211_disconnect(rdev, dev, reason, true);
7722         wdev_unlock(dev->ieee80211_ptr);
7723         return ret;
7724 }
7725
7726 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
7727 {
7728         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7729         struct net *net;
7730         int err;
7731         u32 pid;
7732
7733         if (!info->attrs[NL80211_ATTR_PID])
7734                 return -EINVAL;
7735
7736         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
7737
7738         net = get_net_ns_by_pid(pid);
7739         if (IS_ERR(net))
7740                 return PTR_ERR(net);
7741
7742         err = 0;
7743
7744         /* check if anything to do */
7745         if (!net_eq(wiphy_net(&rdev->wiphy), net))
7746                 err = cfg80211_switch_netns(rdev, net);
7747
7748         put_net(net);
7749         return err;
7750 }
7751
7752 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
7753 {
7754         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7755         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
7756                         struct cfg80211_pmksa *pmksa) = NULL;
7757         struct net_device *dev = info->user_ptr[1];
7758         struct cfg80211_pmksa pmksa;
7759
7760         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
7761
7762         if (!info->attrs[NL80211_ATTR_MAC])
7763                 return -EINVAL;
7764
7765         if (!info->attrs[NL80211_ATTR_PMKID])
7766                 return -EINVAL;
7767
7768         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
7769         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7770
7771         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7772             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7773                 return -EOPNOTSUPP;
7774
7775         switch (info->genlhdr->cmd) {
7776         case NL80211_CMD_SET_PMKSA:
7777                 rdev_ops = rdev->ops->set_pmksa;
7778                 break;
7779         case NL80211_CMD_DEL_PMKSA:
7780                 rdev_ops = rdev->ops->del_pmksa;
7781                 break;
7782         default:
7783                 WARN_ON(1);
7784                 break;
7785         }
7786
7787         if (!rdev_ops)
7788                 return -EOPNOTSUPP;
7789
7790         return rdev_ops(&rdev->wiphy, dev, &pmksa);
7791 }
7792
7793 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
7794 {
7795         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7796         struct net_device *dev = info->user_ptr[1];
7797
7798         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7799             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7800                 return -EOPNOTSUPP;
7801
7802         if (!rdev->ops->flush_pmksa)
7803                 return -EOPNOTSUPP;
7804
7805         return rdev_flush_pmksa(rdev, dev);
7806 }
7807
7808 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
7809 {
7810         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7811         struct net_device *dev = info->user_ptr[1];
7812         u8 action_code, dialog_token;
7813         u32 peer_capability = 0;
7814         u16 status_code;
7815         u8 *peer;
7816         bool initiator;
7817
7818         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7819             !rdev->ops->tdls_mgmt)
7820                 return -EOPNOTSUPP;
7821
7822         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
7823             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
7824             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
7825             !info->attrs[NL80211_ATTR_IE] ||
7826             !info->attrs[NL80211_ATTR_MAC])
7827                 return -EINVAL;
7828
7829         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7830         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
7831         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
7832         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
7833         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
7834         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
7835                 peer_capability =
7836                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
7837
7838         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
7839                               dialog_token, status_code, peer_capability,
7840                               initiator,
7841                               nla_data(info->attrs[NL80211_ATTR_IE]),
7842                               nla_len(info->attrs[NL80211_ATTR_IE]));
7843 }
7844
7845 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
7846 {
7847         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7848         struct net_device *dev = info->user_ptr[1];
7849         enum nl80211_tdls_operation operation;
7850         u8 *peer;
7851
7852         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7853             !rdev->ops->tdls_oper)
7854                 return -EOPNOTSUPP;
7855
7856         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
7857             !info->attrs[NL80211_ATTR_MAC])
7858                 return -EINVAL;
7859
7860         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
7861         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7862
7863         return rdev_tdls_oper(rdev, dev, peer, operation);
7864 }
7865
7866 static int nl80211_remain_on_channel(struct sk_buff *skb,
7867                                      struct genl_info *info)
7868 {
7869         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7870         struct wireless_dev *wdev = info->user_ptr[1];
7871         struct cfg80211_chan_def chandef;
7872         struct sk_buff *msg;
7873         void *hdr;
7874         u64 cookie;
7875         u32 duration;
7876         int err;
7877
7878         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7879             !info->attrs[NL80211_ATTR_DURATION])
7880                 return -EINVAL;
7881
7882         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7883
7884         if (!rdev->ops->remain_on_channel ||
7885             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
7886                 return -EOPNOTSUPP;
7887
7888         /*
7889          * We should be on that channel for at least a minimum amount of
7890          * time (10ms) but no longer than the driver supports.
7891          */
7892         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7893             duration > rdev->wiphy.max_remain_on_channel_duration)
7894                 return -EINVAL;
7895
7896         err = nl80211_parse_chandef(rdev, info, &chandef);
7897         if (err)
7898                 return err;
7899
7900         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7901         if (!msg)
7902                 return -ENOMEM;
7903
7904         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7905                              NL80211_CMD_REMAIN_ON_CHANNEL);
7906         if (!hdr) {
7907                 err = -ENOBUFS;
7908                 goto free_msg;
7909         }
7910
7911         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
7912                                      duration, &cookie);
7913
7914         if (err)
7915                 goto free_msg;
7916
7917         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7918                 goto nla_put_failure;
7919
7920         genlmsg_end(msg, hdr);
7921
7922         return genlmsg_reply(msg, info);
7923
7924  nla_put_failure:
7925         err = -ENOBUFS;
7926  free_msg:
7927         nlmsg_free(msg);
7928         return err;
7929 }
7930
7931 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
7932                                             struct genl_info *info)
7933 {
7934         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7935         struct wireless_dev *wdev = info->user_ptr[1];
7936         u64 cookie;
7937
7938         if (!info->attrs[NL80211_ATTR_COOKIE])
7939                 return -EINVAL;
7940
7941         if (!rdev->ops->cancel_remain_on_channel)
7942                 return -EOPNOTSUPP;
7943
7944         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7945
7946         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
7947 }
7948
7949 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
7950                            u8 *rates, u8 rates_len)
7951 {
7952         u8 i;
7953         u32 mask = 0;
7954
7955         for (i = 0; i < rates_len; i++) {
7956                 int rate = (rates[i] & 0x7f) * 5;
7957                 int ridx;
7958                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
7959                         struct ieee80211_rate *srate =
7960                                 &sband->bitrates[ridx];
7961                         if (rate == srate->bitrate) {
7962                                 mask |= 1 << ridx;
7963                                 break;
7964                         }
7965                 }
7966                 if (ridx == sband->n_bitrates)
7967                         return 0; /* rate not found */
7968         }
7969
7970         return mask;
7971 }
7972
7973 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
7974                                u8 *rates, u8 rates_len,
7975                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
7976 {
7977         u8 i;
7978
7979         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
7980
7981         for (i = 0; i < rates_len; i++) {
7982                 int ridx, rbit;
7983
7984                 ridx = rates[i] / 8;
7985                 rbit = BIT(rates[i] % 8);
7986
7987                 /* check validity */
7988                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
7989                         return false;
7990
7991                 /* check availability */
7992                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
7993                         mcs[ridx] |= rbit;
7994                 else
7995                         return false;
7996         }
7997
7998         return true;
7999 }
8000
8001 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
8002 {
8003         u16 mcs_mask = 0;
8004
8005         switch (vht_mcs_map) {
8006         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
8007                 break;
8008         case IEEE80211_VHT_MCS_SUPPORT_0_7:
8009                 mcs_mask = 0x00FF;
8010                 break;
8011         case IEEE80211_VHT_MCS_SUPPORT_0_8:
8012                 mcs_mask = 0x01FF;
8013                 break;
8014         case IEEE80211_VHT_MCS_SUPPORT_0_9:
8015                 mcs_mask = 0x03FF;
8016                 break;
8017         default:
8018                 break;
8019         }
8020
8021         return mcs_mask;
8022 }
8023
8024 static void vht_build_mcs_mask(u16 vht_mcs_map,
8025                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
8026 {
8027         u8 nss;
8028
8029         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
8030                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
8031                 vht_mcs_map >>= 2;
8032         }
8033 }
8034
8035 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
8036                              struct nl80211_txrate_vht *txrate,
8037                              u16 mcs[NL80211_VHT_NSS_MAX])
8038 {
8039         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8040         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
8041         u8 i;
8042
8043         if (!sband->vht_cap.vht_supported)
8044                 return false;
8045
8046         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
8047
8048         /* Build vht_mcs_mask from VHT capabilities */
8049         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
8050
8051         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
8052                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
8053                         mcs[i] = txrate->mcs[i];
8054                 else
8055                         return false;
8056         }
8057
8058         return true;
8059 }
8060
8061 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
8062         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
8063                                     .len = NL80211_MAX_SUPP_RATES },
8064         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
8065                                 .len = NL80211_MAX_SUPP_HT_RATES },
8066         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
8067         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
8068 };
8069
8070 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
8071                                        struct genl_info *info)
8072 {
8073         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
8074         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8075         struct cfg80211_bitrate_mask mask;
8076         int rem, i;
8077         struct net_device *dev = info->user_ptr[1];
8078         struct nlattr *tx_rates;
8079         struct ieee80211_supported_band *sband;
8080         u16 vht_tx_mcs_map;
8081
8082         if (!rdev->ops->set_bitrate_mask)
8083                 return -EOPNOTSUPP;
8084
8085         memset(&mask, 0, sizeof(mask));
8086         /* Default to all rates enabled */
8087         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
8088                 sband = rdev->wiphy.bands[i];
8089
8090                 if (!sband)
8091                         continue;
8092
8093                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
8094                 memcpy(mask.control[i].ht_mcs,
8095                        sband->ht_cap.mcs.rx_mask,
8096                        sizeof(mask.control[i].ht_mcs));
8097
8098                 if (!sband->vht_cap.vht_supported)
8099                         continue;
8100
8101                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8102                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
8103         }
8104
8105         /* if no rates are given set it back to the defaults */
8106         if (!info->attrs[NL80211_ATTR_TX_RATES])
8107                 goto out;
8108
8109         /*
8110          * The nested attribute uses enum nl80211_band as the index. This maps
8111          * directly to the enum ieee80211_band values used in cfg80211.
8112          */
8113         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
8114         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
8115                 enum ieee80211_band band = nla_type(tx_rates);
8116                 int err;
8117
8118                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
8119                         return -EINVAL;
8120                 sband = rdev->wiphy.bands[band];
8121                 if (sband == NULL)
8122                         return -EINVAL;
8123                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
8124                                 nla_len(tx_rates), nl80211_txattr_policy);
8125                 if (err)
8126                         return err;
8127                 if (tb[NL80211_TXRATE_LEGACY]) {
8128                         mask.control[band].legacy = rateset_to_mask(
8129                                 sband,
8130                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
8131                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
8132                         if ((mask.control[band].legacy == 0) &&
8133                             nla_len(tb[NL80211_TXRATE_LEGACY]))
8134                                 return -EINVAL;
8135                 }
8136                 if (tb[NL80211_TXRATE_HT]) {
8137                         if (!ht_rateset_to_mask(
8138                                         sband,
8139                                         nla_data(tb[NL80211_TXRATE_HT]),
8140                                         nla_len(tb[NL80211_TXRATE_HT]),
8141                                         mask.control[band].ht_mcs))
8142                                 return -EINVAL;
8143                 }
8144                 if (tb[NL80211_TXRATE_VHT]) {
8145                         if (!vht_set_mcs_mask(
8146                                         sband,
8147                                         nla_data(tb[NL80211_TXRATE_VHT]),
8148                                         mask.control[band].vht_mcs))
8149                                 return -EINVAL;
8150                 }
8151                 if (tb[NL80211_TXRATE_GI]) {
8152                         mask.control[band].gi =
8153                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
8154                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
8155                                 return -EINVAL;
8156                 }
8157
8158                 if (mask.control[band].legacy == 0) {
8159                         /* don't allow empty legacy rates if HT or VHT
8160                          * are not even supported.
8161                          */
8162                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
8163                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
8164                                 return -EINVAL;
8165
8166                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
8167                                 if (mask.control[band].ht_mcs[i])
8168                                         goto out;
8169
8170                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
8171                                 if (mask.control[band].vht_mcs[i])
8172                                         goto out;
8173
8174                         /* legacy and mcs rates may not be both empty */
8175                         return -EINVAL;
8176                 }
8177         }
8178
8179 out:
8180         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8181 }
8182
8183 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8184 {
8185         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8186         struct wireless_dev *wdev = info->user_ptr[1];
8187         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8188
8189         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8190                 return -EINVAL;
8191
8192         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8193                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8194
8195         switch (wdev->iftype) {
8196         case NL80211_IFTYPE_STATION:
8197         case NL80211_IFTYPE_ADHOC:
8198         case NL80211_IFTYPE_P2P_CLIENT:
8199         case NL80211_IFTYPE_AP:
8200         case NL80211_IFTYPE_AP_VLAN:
8201         case NL80211_IFTYPE_MESH_POINT:
8202         case NL80211_IFTYPE_P2P_GO:
8203         case NL80211_IFTYPE_P2P_DEVICE:
8204                 break;
8205         default:
8206                 return -EOPNOTSUPP;
8207         }
8208
8209         /* not much point in registering if we can't reply */
8210         if (!rdev->ops->mgmt_tx)
8211                 return -EOPNOTSUPP;
8212
8213         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8214                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8215                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8216 }
8217
8218 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
8219 {
8220         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8221         struct wireless_dev *wdev = info->user_ptr[1];
8222         struct cfg80211_chan_def chandef;
8223         int err;
8224         void *hdr = NULL;
8225         u64 cookie;
8226         struct sk_buff *msg = NULL;
8227         struct cfg80211_mgmt_tx_params params = {
8228                 .dont_wait_for_ack =
8229                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8230         };
8231
8232         if (!info->attrs[NL80211_ATTR_FRAME])
8233                 return -EINVAL;
8234
8235         if (!rdev->ops->mgmt_tx)
8236                 return -EOPNOTSUPP;
8237
8238         switch (wdev->iftype) {
8239         case NL80211_IFTYPE_P2P_DEVICE:
8240                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8241                         return -EINVAL;
8242         case NL80211_IFTYPE_STATION:
8243         case NL80211_IFTYPE_ADHOC:
8244         case NL80211_IFTYPE_P2P_CLIENT:
8245         case NL80211_IFTYPE_AP:
8246         case NL80211_IFTYPE_AP_VLAN:
8247         case NL80211_IFTYPE_MESH_POINT:
8248         case NL80211_IFTYPE_P2P_GO:
8249                 break;
8250         default:
8251                 return -EOPNOTSUPP;
8252         }
8253
8254         if (info->attrs[NL80211_ATTR_DURATION]) {
8255                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8256                         return -EINVAL;
8257                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8258
8259                 /*
8260                  * We should wait on the channel for at least a minimum amount
8261                  * of time (10ms) but no longer than the driver supports.
8262                  */
8263                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8264                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
8265                         return -EINVAL;
8266
8267         }
8268
8269         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
8270
8271         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8272                 return -EINVAL;
8273
8274         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
8275
8276         /* get the channel if any has been specified, otherwise pass NULL to
8277          * the driver. The latter will use the current one
8278          */
8279         chandef.chan = NULL;
8280         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8281                 err = nl80211_parse_chandef(rdev, info, &chandef);
8282                 if (err)
8283                         return err;
8284         }
8285
8286         if (!chandef.chan && params.offchan)
8287                 return -EINVAL;
8288
8289         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
8290         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
8291
8292         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
8293                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8294                 int i;
8295
8296                 if (len % sizeof(u16))
8297                         return -EINVAL;
8298
8299                 params.n_csa_offsets = len / sizeof(u16);
8300                 params.csa_offsets =
8301                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8302
8303                 /* check that all the offsets fit the frame */
8304                 for (i = 0; i < params.n_csa_offsets; i++) {
8305                         if (params.csa_offsets[i] >= params.len)
8306                                 return -EINVAL;
8307                 }
8308         }
8309
8310         if (!params.dont_wait_for_ack) {
8311                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8312                 if (!msg)
8313                         return -ENOMEM;
8314
8315                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8316                                      NL80211_CMD_FRAME);
8317                 if (!hdr) {
8318                         err = -ENOBUFS;
8319                         goto free_msg;
8320                 }
8321         }
8322
8323         params.chan = chandef.chan;
8324         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
8325         if (err)
8326                 goto free_msg;
8327
8328         if (msg) {
8329                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8330                         goto nla_put_failure;
8331
8332                 genlmsg_end(msg, hdr);
8333                 return genlmsg_reply(msg, info);
8334         }
8335
8336         return 0;
8337
8338  nla_put_failure:
8339         err = -ENOBUFS;
8340  free_msg:
8341         nlmsg_free(msg);
8342         return err;
8343 }
8344
8345 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
8346 {
8347         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8348         struct wireless_dev *wdev = info->user_ptr[1];
8349         u64 cookie;
8350
8351         if (!info->attrs[NL80211_ATTR_COOKIE])
8352                 return -EINVAL;
8353
8354         if (!rdev->ops->mgmt_tx_cancel_wait)
8355                 return -EOPNOTSUPP;
8356
8357         switch (wdev->iftype) {
8358         case NL80211_IFTYPE_STATION:
8359         case NL80211_IFTYPE_ADHOC:
8360         case NL80211_IFTYPE_P2P_CLIENT:
8361         case NL80211_IFTYPE_AP:
8362         case NL80211_IFTYPE_AP_VLAN:
8363         case NL80211_IFTYPE_P2P_GO:
8364         case NL80211_IFTYPE_P2P_DEVICE:
8365                 break;
8366         default:
8367                 return -EOPNOTSUPP;
8368         }
8369
8370         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8371
8372         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
8373 }
8374
8375 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
8376 {
8377         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8378         struct wireless_dev *wdev;
8379         struct net_device *dev = info->user_ptr[1];
8380         u8 ps_state;
8381         bool state;
8382         int err;
8383
8384         if (!info->attrs[NL80211_ATTR_PS_STATE])
8385                 return -EINVAL;
8386
8387         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
8388
8389         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
8390                 return -EINVAL;
8391
8392         wdev = dev->ieee80211_ptr;
8393
8394         if (!rdev->ops->set_power_mgmt)
8395                 return -EOPNOTSUPP;
8396
8397         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
8398
8399         if (state == wdev->ps)
8400                 return 0;
8401
8402         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
8403         if (!err)
8404                 wdev->ps = state;
8405         return err;
8406 }
8407
8408 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
8409 {
8410         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8411         enum nl80211_ps_state ps_state;
8412         struct wireless_dev *wdev;
8413         struct net_device *dev = info->user_ptr[1];
8414         struct sk_buff *msg;
8415         void *hdr;
8416         int err;
8417
8418         wdev = dev->ieee80211_ptr;
8419
8420         if (!rdev->ops->set_power_mgmt)
8421                 return -EOPNOTSUPP;
8422
8423         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8424         if (!msg)
8425                 return -ENOMEM;
8426
8427         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8428                              NL80211_CMD_GET_POWER_SAVE);
8429         if (!hdr) {
8430                 err = -ENOBUFS;
8431                 goto free_msg;
8432         }
8433
8434         if (wdev->ps)
8435                 ps_state = NL80211_PS_ENABLED;
8436         else
8437                 ps_state = NL80211_PS_DISABLED;
8438
8439         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
8440                 goto nla_put_failure;
8441
8442         genlmsg_end(msg, hdr);
8443         return genlmsg_reply(msg, info);
8444
8445  nla_put_failure:
8446         err = -ENOBUFS;
8447  free_msg:
8448         nlmsg_free(msg);
8449         return err;
8450 }
8451
8452 static const struct nla_policy
8453 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
8454         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
8455         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
8456         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
8457         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
8458         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
8459         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
8460 };
8461
8462 static int nl80211_set_cqm_txe(struct genl_info *info,
8463                                u32 rate, u32 pkts, u32 intvl)
8464 {
8465         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8466         struct net_device *dev = info->user_ptr[1];
8467         struct wireless_dev *wdev = dev->ieee80211_ptr;
8468
8469         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
8470                 return -EINVAL;
8471
8472         if (!rdev->ops->set_cqm_txe_config)
8473                 return -EOPNOTSUPP;
8474
8475         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8476             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8477                 return -EOPNOTSUPP;
8478
8479         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
8480 }
8481
8482 static int nl80211_set_cqm_rssi(struct genl_info *info,
8483                                 s32 threshold, u32 hysteresis)
8484 {
8485         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8486         struct net_device *dev = info->user_ptr[1];
8487         struct wireless_dev *wdev = dev->ieee80211_ptr;
8488
8489         if (threshold > 0)
8490                 return -EINVAL;
8491
8492         /* disabling - hysteresis should also be zero then */
8493         if (threshold == 0)
8494                 hysteresis = 0;
8495
8496         if (!rdev->ops->set_cqm_rssi_config)
8497                 return -EOPNOTSUPP;
8498
8499         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8500             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8501                 return -EOPNOTSUPP;
8502
8503         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
8504 }
8505
8506 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
8507 {
8508         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
8509         struct nlattr *cqm;
8510         int err;
8511
8512         cqm = info->attrs[NL80211_ATTR_CQM];
8513         if (!cqm)
8514                 return -EINVAL;
8515
8516         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
8517                                nl80211_attr_cqm_policy);
8518         if (err)
8519                 return err;
8520
8521         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
8522             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
8523                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
8524                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
8525
8526                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
8527         }
8528
8529         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
8530             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
8531             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
8532                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
8533                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
8534                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
8535
8536                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
8537         }
8538
8539         return -EINVAL;
8540 }
8541
8542 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
8543 {
8544         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8545         struct net_device *dev = info->user_ptr[1];
8546         struct ocb_setup setup = {};
8547         int err;
8548
8549         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8550         if (err)
8551                 return err;
8552
8553         return cfg80211_join_ocb(rdev, dev, &setup);
8554 }
8555
8556 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
8557 {
8558         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8559         struct net_device *dev = info->user_ptr[1];
8560
8561         return cfg80211_leave_ocb(rdev, dev);
8562 }
8563
8564 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
8565 {
8566         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8567         struct net_device *dev = info->user_ptr[1];
8568         struct mesh_config cfg;
8569         struct mesh_setup setup;
8570         int err;
8571
8572         /* start with default */
8573         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
8574         memcpy(&setup, &default_mesh_setup, sizeof(setup));
8575
8576         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
8577                 /* and parse parameters if given */
8578                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
8579                 if (err)
8580                         return err;
8581         }
8582
8583         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
8584             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
8585                 return -EINVAL;
8586
8587         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
8588         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
8589
8590         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
8591             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
8592                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
8593                         return -EINVAL;
8594
8595         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
8596                 setup.beacon_interval =
8597                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
8598                 if (setup.beacon_interval < 10 ||
8599                     setup.beacon_interval > 10000)
8600                         return -EINVAL;
8601         }
8602
8603         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
8604                 setup.dtim_period =
8605                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
8606                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
8607                         return -EINVAL;
8608         }
8609
8610         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
8611                 /* parse additional setup parameters if given */
8612                 err = nl80211_parse_mesh_setup(info, &setup);
8613                 if (err)
8614                         return err;
8615         }
8616
8617         if (setup.user_mpm)
8618                 cfg.auto_open_plinks = false;
8619
8620         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8621                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8622                 if (err)
8623                         return err;
8624         } else {
8625                 /* cfg80211_join_mesh() will sort it out */
8626                 setup.chandef.chan = NULL;
8627         }
8628
8629         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
8630                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8631                 int n_rates =
8632                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8633                 struct ieee80211_supported_band *sband;
8634
8635                 if (!setup.chandef.chan)
8636                         return -EINVAL;
8637
8638                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
8639
8640                 err = ieee80211_get_ratemask(sband, rates, n_rates,
8641                                              &setup.basic_rates);
8642                 if (err)
8643                         return err;
8644         }
8645
8646         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
8647 }
8648
8649 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
8650 {
8651         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8652         struct net_device *dev = info->user_ptr[1];
8653
8654         return cfg80211_leave_mesh(rdev, dev);
8655 }
8656
8657 #ifdef CONFIG_PM
8658 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
8659                                         struct cfg80211_registered_device *rdev)
8660 {
8661         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
8662         struct nlattr *nl_pats, *nl_pat;
8663         int i, pat_len;
8664
8665         if (!wowlan->n_patterns)
8666                 return 0;
8667
8668         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
8669         if (!nl_pats)
8670                 return -ENOBUFS;
8671
8672         for (i = 0; i < wowlan->n_patterns; i++) {
8673                 nl_pat = nla_nest_start(msg, i + 1);
8674                 if (!nl_pat)
8675                         return -ENOBUFS;
8676                 pat_len = wowlan->patterns[i].pattern_len;
8677                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
8678                             wowlan->patterns[i].mask) ||
8679                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8680                             wowlan->patterns[i].pattern) ||
8681                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8682                                 wowlan->patterns[i].pkt_offset))
8683                         return -ENOBUFS;
8684                 nla_nest_end(msg, nl_pat);
8685         }
8686         nla_nest_end(msg, nl_pats);
8687
8688         return 0;
8689 }
8690
8691 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
8692                                    struct cfg80211_wowlan_tcp *tcp)
8693 {
8694         struct nlattr *nl_tcp;
8695
8696         if (!tcp)
8697                 return 0;
8698
8699         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
8700         if (!nl_tcp)
8701                 return -ENOBUFS;
8702
8703         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
8704             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
8705             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
8706             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
8707             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
8708             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
8709                     tcp->payload_len, tcp->payload) ||
8710             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
8711                         tcp->data_interval) ||
8712             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
8713                     tcp->wake_len, tcp->wake_data) ||
8714             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
8715                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
8716                 return -ENOBUFS;
8717
8718         if (tcp->payload_seq.len &&
8719             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
8720                     sizeof(tcp->payload_seq), &tcp->payload_seq))
8721                 return -ENOBUFS;
8722
8723         if (tcp->payload_tok.len &&
8724             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
8725                     sizeof(tcp->payload_tok) + tcp->tokens_size,
8726                     &tcp->payload_tok))
8727                 return -ENOBUFS;
8728
8729         nla_nest_end(msg, nl_tcp);
8730
8731         return 0;
8732 }
8733
8734 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
8735 {
8736         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8737         struct sk_buff *msg;
8738         void *hdr;
8739         u32 size = NLMSG_DEFAULT_SIZE;
8740
8741         if (!rdev->wiphy.wowlan)
8742                 return -EOPNOTSUPP;
8743
8744         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
8745                 /* adjust size to have room for all the data */
8746                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
8747                         rdev->wiphy.wowlan_config->tcp->payload_len +
8748                         rdev->wiphy.wowlan_config->tcp->wake_len +
8749                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
8750         }
8751
8752         msg = nlmsg_new(size, GFP_KERNEL);
8753         if (!msg)
8754                 return -ENOMEM;
8755
8756         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8757                              NL80211_CMD_GET_WOWLAN);
8758         if (!hdr)
8759                 goto nla_put_failure;
8760
8761         if (rdev->wiphy.wowlan_config) {
8762                 struct nlattr *nl_wowlan;
8763
8764                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
8765                 if (!nl_wowlan)
8766                         goto nla_put_failure;
8767
8768                 if ((rdev->wiphy.wowlan_config->any &&
8769                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
8770                     (rdev->wiphy.wowlan_config->disconnect &&
8771                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
8772                     (rdev->wiphy.wowlan_config->magic_pkt &&
8773                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
8774                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
8775                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
8776                     (rdev->wiphy.wowlan_config->eap_identity_req &&
8777                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
8778                     (rdev->wiphy.wowlan_config->four_way_handshake &&
8779                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
8780                     (rdev->wiphy.wowlan_config->rfkill_release &&
8781                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
8782                         goto nla_put_failure;
8783
8784                 if (nl80211_send_wowlan_patterns(msg, rdev))
8785                         goto nla_put_failure;
8786
8787                 if (nl80211_send_wowlan_tcp(msg,
8788                                             rdev->wiphy.wowlan_config->tcp))
8789                         goto nla_put_failure;
8790
8791                 nla_nest_end(msg, nl_wowlan);
8792         }
8793
8794         genlmsg_end(msg, hdr);
8795         return genlmsg_reply(msg, info);
8796
8797 nla_put_failure:
8798         nlmsg_free(msg);
8799         return -ENOBUFS;
8800 }
8801
8802 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
8803                                     struct nlattr *attr,
8804                                     struct cfg80211_wowlan *trig)
8805 {
8806         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
8807         struct cfg80211_wowlan_tcp *cfg;
8808         struct nl80211_wowlan_tcp_data_token *tok = NULL;
8809         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
8810         u32 size;
8811         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
8812         int err, port;
8813
8814         if (!rdev->wiphy.wowlan->tcp)
8815                 return -EINVAL;
8816
8817         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
8818                         nla_data(attr), nla_len(attr),
8819                         nl80211_wowlan_tcp_policy);
8820         if (err)
8821                 return err;
8822
8823         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
8824             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
8825             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
8826             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
8827             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
8828             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
8829             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
8830             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
8831                 return -EINVAL;
8832
8833         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
8834         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
8835                 return -EINVAL;
8836
8837         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
8838                         rdev->wiphy.wowlan->tcp->data_interval_max ||
8839             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
8840                 return -EINVAL;
8841
8842         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
8843         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
8844                 return -EINVAL;
8845
8846         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
8847         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
8848                 return -EINVAL;
8849
8850         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
8851                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8852
8853                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8854                 tokens_size = tokln - sizeof(*tok);
8855
8856                 if (!tok->len || tokens_size % tok->len)
8857                         return -EINVAL;
8858                 if (!rdev->wiphy.wowlan->tcp->tok)
8859                         return -EINVAL;
8860                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
8861                         return -EINVAL;
8862                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
8863                         return -EINVAL;
8864                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
8865                         return -EINVAL;
8866                 if (tok->offset + tok->len > data_size)
8867                         return -EINVAL;
8868         }
8869
8870         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
8871                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
8872                 if (!rdev->wiphy.wowlan->tcp->seq)
8873                         return -EINVAL;
8874                 if (seq->len == 0 || seq->len > 4)
8875                         return -EINVAL;
8876                 if (seq->len + seq->offset > data_size)
8877                         return -EINVAL;
8878         }
8879
8880         size = sizeof(*cfg);
8881         size += data_size;
8882         size += wake_size + wake_mask_size;
8883         size += tokens_size;
8884
8885         cfg = kzalloc(size, GFP_KERNEL);
8886         if (!cfg)
8887                 return -ENOMEM;
8888         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
8889         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
8890         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
8891                ETH_ALEN);
8892         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
8893                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
8894         else
8895                 port = 0;
8896 #ifdef CONFIG_INET
8897         /* allocate a socket and port for it and use it */
8898         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
8899                             IPPROTO_TCP, &cfg->sock, 1);
8900         if (err) {
8901                 kfree(cfg);
8902                 return err;
8903         }
8904         if (inet_csk_get_port(cfg->sock->sk, port)) {
8905                 sock_release(cfg->sock);
8906                 kfree(cfg);
8907                 return -EADDRINUSE;
8908         }
8909         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
8910 #else
8911         if (!port) {
8912                 kfree(cfg);
8913                 return -EINVAL;
8914         }
8915         cfg->src_port = port;
8916 #endif
8917
8918         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
8919         cfg->payload_len = data_size;
8920         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
8921         memcpy((void *)cfg->payload,
8922                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
8923                data_size);
8924         if (seq)
8925                 cfg->payload_seq = *seq;
8926         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
8927         cfg->wake_len = wake_size;
8928         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
8929         memcpy((void *)cfg->wake_data,
8930                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
8931                wake_size);
8932         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
8933                          data_size + wake_size;
8934         memcpy((void *)cfg->wake_mask,
8935                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
8936                wake_mask_size);
8937         if (tok) {
8938                 cfg->tokens_size = tokens_size;
8939                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
8940         }
8941
8942         trig->tcp = cfg;
8943
8944         return 0;
8945 }
8946
8947 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
8948                                    const struct wiphy_wowlan_support *wowlan,
8949                                    struct nlattr *attr,
8950                                    struct cfg80211_wowlan *trig)
8951 {
8952         struct nlattr **tb;
8953         int err;
8954
8955         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
8956         if (!tb)
8957                 return -ENOMEM;
8958
8959         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
8960                 err = -EOPNOTSUPP;
8961                 goto out;
8962         }
8963
8964         err = nla_parse(tb, NL80211_ATTR_MAX,
8965                         nla_data(attr), nla_len(attr),
8966                         nl80211_policy);
8967         if (err)
8968                 goto out;
8969
8970         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
8971         err = PTR_ERR_OR_ZERO(trig->nd_config);
8972         if (err)
8973                 trig->nd_config = NULL;
8974
8975 out:
8976         kfree(tb);
8977         return err;
8978 }
8979
8980 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
8981 {
8982         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8983         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
8984         struct cfg80211_wowlan new_triggers = {};
8985         struct cfg80211_wowlan *ntrig;
8986         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
8987         int err, i;
8988         bool prev_enabled = rdev->wiphy.wowlan_config;
8989
8990         if (!wowlan)
8991                 return -EOPNOTSUPP;
8992
8993         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
8994                 cfg80211_rdev_free_wowlan(rdev);
8995                 rdev->wiphy.wowlan_config = NULL;
8996                 goto set_wakeup;
8997         }
8998
8999         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
9000                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9001                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9002                         nl80211_wowlan_policy);
9003         if (err)
9004                 return err;
9005
9006         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
9007                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
9008                         return -EINVAL;
9009                 new_triggers.any = true;
9010         }
9011
9012         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
9013                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
9014                         return -EINVAL;
9015                 new_triggers.disconnect = true;
9016         }
9017
9018         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
9019                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
9020                         return -EINVAL;
9021                 new_triggers.magic_pkt = true;
9022         }
9023
9024         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
9025                 return -EINVAL;
9026
9027         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
9028                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
9029                         return -EINVAL;
9030                 new_triggers.gtk_rekey_failure = true;
9031         }
9032
9033         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
9034                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
9035                         return -EINVAL;
9036                 new_triggers.eap_identity_req = true;
9037         }
9038
9039         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
9040                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
9041                         return -EINVAL;
9042                 new_triggers.four_way_handshake = true;
9043         }
9044
9045         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
9046                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
9047                         return -EINVAL;
9048                 new_triggers.rfkill_release = true;
9049         }
9050
9051         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
9052                 struct nlattr *pat;
9053                 int n_patterns = 0;
9054                 int rem, pat_len, mask_len, pkt_offset;
9055                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9056
9057                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9058                                     rem)
9059                         n_patterns++;
9060                 if (n_patterns > wowlan->n_patterns)
9061                         return -EINVAL;
9062
9063                 new_triggers.patterns = kcalloc(n_patterns,
9064                                                 sizeof(new_triggers.patterns[0]),
9065                                                 GFP_KERNEL);
9066                 if (!new_triggers.patterns)
9067                         return -ENOMEM;
9068
9069                 new_triggers.n_patterns = n_patterns;
9070                 i = 0;
9071
9072                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9073                                     rem) {
9074                         u8 *mask_pat;
9075
9076                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9077                                   nla_len(pat), NULL);
9078                         err = -EINVAL;
9079                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
9080                             !pat_tb[NL80211_PKTPAT_PATTERN])
9081                                 goto error;
9082                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9083                         mask_len = DIV_ROUND_UP(pat_len, 8);
9084                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9085                                 goto error;
9086                         if (pat_len > wowlan->pattern_max_len ||
9087                             pat_len < wowlan->pattern_min_len)
9088                                 goto error;
9089
9090                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
9091                                 pkt_offset = 0;
9092                         else
9093                                 pkt_offset = nla_get_u32(
9094                                         pat_tb[NL80211_PKTPAT_OFFSET]);
9095                         if (pkt_offset > wowlan->max_pkt_offset)
9096                                 goto error;
9097                         new_triggers.patterns[i].pkt_offset = pkt_offset;
9098
9099                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9100                         if (!mask_pat) {
9101                                 err = -ENOMEM;
9102                                 goto error;
9103                         }
9104                         new_triggers.patterns[i].mask = mask_pat;
9105                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9106                                mask_len);
9107                         mask_pat += mask_len;
9108                         new_triggers.patterns[i].pattern = mask_pat;
9109                         new_triggers.patterns[i].pattern_len = pat_len;
9110                         memcpy(mask_pat,
9111                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9112                                pat_len);
9113                         i++;
9114                 }
9115         }
9116
9117         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
9118                 err = nl80211_parse_wowlan_tcp(
9119                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
9120                         &new_triggers);
9121                 if (err)
9122                         goto error;
9123         }
9124
9125         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
9126                 err = nl80211_parse_wowlan_nd(
9127                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
9128                         &new_triggers);
9129                 if (err)
9130                         goto error;
9131         }
9132
9133         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
9134         if (!ntrig) {
9135                 err = -ENOMEM;
9136                 goto error;
9137         }
9138         cfg80211_rdev_free_wowlan(rdev);
9139         rdev->wiphy.wowlan_config = ntrig;
9140
9141  set_wakeup:
9142         if (rdev->ops->set_wakeup &&
9143             prev_enabled != !!rdev->wiphy.wowlan_config)
9144                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
9145
9146         return 0;
9147  error:
9148         for (i = 0; i < new_triggers.n_patterns; i++)
9149                 kfree(new_triggers.patterns[i].mask);
9150         kfree(new_triggers.patterns);
9151         if (new_triggers.tcp && new_triggers.tcp->sock)
9152                 sock_release(new_triggers.tcp->sock);
9153         kfree(new_triggers.tcp);
9154         return err;
9155 }
9156 #endif
9157
9158 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
9159                                        struct cfg80211_registered_device *rdev)
9160 {
9161         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
9162         int i, j, pat_len;
9163         struct cfg80211_coalesce_rules *rule;
9164
9165         if (!rdev->coalesce->n_rules)
9166                 return 0;
9167
9168         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
9169         if (!nl_rules)
9170                 return -ENOBUFS;
9171
9172         for (i = 0; i < rdev->coalesce->n_rules; i++) {
9173                 nl_rule = nla_nest_start(msg, i + 1);
9174                 if (!nl_rule)
9175                         return -ENOBUFS;
9176
9177                 rule = &rdev->coalesce->rules[i];
9178                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
9179                                 rule->delay))
9180                         return -ENOBUFS;
9181
9182                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
9183                                 rule->condition))
9184                         return -ENOBUFS;
9185
9186                 nl_pats = nla_nest_start(msg,
9187                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
9188                 if (!nl_pats)
9189                         return -ENOBUFS;
9190
9191                 for (j = 0; j < rule->n_patterns; j++) {
9192                         nl_pat = nla_nest_start(msg, j + 1);
9193                         if (!nl_pat)
9194                                 return -ENOBUFS;
9195                         pat_len = rule->patterns[j].pattern_len;
9196                         if (nla_put(msg, NL80211_PKTPAT_MASK,
9197                                     DIV_ROUND_UP(pat_len, 8),
9198                                     rule->patterns[j].mask) ||
9199                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9200                                     rule->patterns[j].pattern) ||
9201                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9202                                         rule->patterns[j].pkt_offset))
9203                                 return -ENOBUFS;
9204                         nla_nest_end(msg, nl_pat);
9205                 }
9206                 nla_nest_end(msg, nl_pats);
9207                 nla_nest_end(msg, nl_rule);
9208         }
9209         nla_nest_end(msg, nl_rules);
9210
9211         return 0;
9212 }
9213
9214 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
9215 {
9216         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9217         struct sk_buff *msg;
9218         void *hdr;
9219
9220         if (!rdev->wiphy.coalesce)
9221                 return -EOPNOTSUPP;
9222
9223         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9224         if (!msg)
9225                 return -ENOMEM;
9226
9227         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9228                              NL80211_CMD_GET_COALESCE);
9229         if (!hdr)
9230                 goto nla_put_failure;
9231
9232         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
9233                 goto nla_put_failure;
9234
9235         genlmsg_end(msg, hdr);
9236         return genlmsg_reply(msg, info);
9237
9238 nla_put_failure:
9239         nlmsg_free(msg);
9240         return -ENOBUFS;
9241 }
9242
9243 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
9244 {
9245         struct cfg80211_coalesce *coalesce = rdev->coalesce;
9246         int i, j;
9247         struct cfg80211_coalesce_rules *rule;
9248
9249         if (!coalesce)
9250                 return;
9251
9252         for (i = 0; i < coalesce->n_rules; i++) {
9253                 rule = &coalesce->rules[i];
9254                 for (j = 0; j < rule->n_patterns; j++)
9255                         kfree(rule->patterns[j].mask);
9256                 kfree(rule->patterns);
9257         }
9258         kfree(coalesce->rules);
9259         kfree(coalesce);
9260         rdev->coalesce = NULL;
9261 }
9262
9263 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
9264                                        struct nlattr *rule,
9265                                        struct cfg80211_coalesce_rules *new_rule)
9266 {
9267         int err, i;
9268         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9269         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
9270         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
9271         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9272
9273         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
9274                         nla_len(rule), nl80211_coalesce_policy);
9275         if (err)
9276                 return err;
9277
9278         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
9279                 new_rule->delay =
9280                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
9281         if (new_rule->delay > coalesce->max_delay)
9282                 return -EINVAL;
9283
9284         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
9285                 new_rule->condition =
9286                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
9287         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
9288             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
9289                 return -EINVAL;
9290
9291         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
9292                 return -EINVAL;
9293
9294         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9295                             rem)
9296                 n_patterns++;
9297         if (n_patterns > coalesce->n_patterns)
9298                 return -EINVAL;
9299
9300         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
9301                                      GFP_KERNEL);
9302         if (!new_rule->patterns)
9303                 return -ENOMEM;
9304
9305         new_rule->n_patterns = n_patterns;
9306         i = 0;
9307
9308         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9309                             rem) {
9310                 u8 *mask_pat;
9311
9312                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9313                           nla_len(pat), NULL);
9314                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
9315                     !pat_tb[NL80211_PKTPAT_PATTERN])
9316                         return -EINVAL;
9317                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9318                 mask_len = DIV_ROUND_UP(pat_len, 8);
9319                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9320                         return -EINVAL;
9321                 if (pat_len > coalesce->pattern_max_len ||
9322                     pat_len < coalesce->pattern_min_len)
9323                         return -EINVAL;
9324
9325                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
9326                         pkt_offset = 0;
9327                 else
9328                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
9329                 if (pkt_offset > coalesce->max_pkt_offset)
9330                         return -EINVAL;
9331                 new_rule->patterns[i].pkt_offset = pkt_offset;
9332
9333                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9334                 if (!mask_pat)
9335                         return -ENOMEM;
9336
9337                 new_rule->patterns[i].mask = mask_pat;
9338                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9339                        mask_len);
9340
9341                 mask_pat += mask_len;
9342                 new_rule->patterns[i].pattern = mask_pat;
9343                 new_rule->patterns[i].pattern_len = pat_len;
9344                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9345                        pat_len);
9346                 i++;
9347         }
9348
9349         return 0;
9350 }
9351
9352 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
9353 {
9354         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9355         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9356         struct cfg80211_coalesce new_coalesce = {};
9357         struct cfg80211_coalesce *n_coalesce;
9358         int err, rem_rule, n_rules = 0, i, j;
9359         struct nlattr *rule;
9360         struct cfg80211_coalesce_rules *tmp_rule;
9361
9362         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
9363                 return -EOPNOTSUPP;
9364
9365         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
9366                 cfg80211_rdev_free_coalesce(rdev);
9367                 rdev->ops->set_coalesce(&rdev->wiphy, NULL);
9368                 return 0;
9369         }
9370
9371         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9372                             rem_rule)
9373                 n_rules++;
9374         if (n_rules > coalesce->n_rules)
9375                 return -EINVAL;
9376
9377         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
9378                                      GFP_KERNEL);
9379         if (!new_coalesce.rules)
9380                 return -ENOMEM;
9381
9382         new_coalesce.n_rules = n_rules;
9383         i = 0;
9384
9385         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9386                             rem_rule) {
9387                 err = nl80211_parse_coalesce_rule(rdev, rule,
9388                                                   &new_coalesce.rules[i]);
9389                 if (err)
9390                         goto error;
9391
9392                 i++;
9393         }
9394
9395         err = rdev->ops->set_coalesce(&rdev->wiphy, &new_coalesce);
9396         if (err)
9397                 goto error;
9398
9399         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
9400         if (!n_coalesce) {
9401                 err = -ENOMEM;
9402                 goto error;
9403         }
9404         cfg80211_rdev_free_coalesce(rdev);
9405         rdev->coalesce = n_coalesce;
9406
9407         return 0;
9408 error:
9409         for (i = 0; i < new_coalesce.n_rules; i++) {
9410                 tmp_rule = &new_coalesce.rules[i];
9411                 for (j = 0; j < tmp_rule->n_patterns; j++)
9412                         kfree(tmp_rule->patterns[j].mask);
9413                 kfree(tmp_rule->patterns);
9414         }
9415         kfree(new_coalesce.rules);
9416
9417         return err;
9418 }
9419
9420 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
9421 {
9422         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9423         struct net_device *dev = info->user_ptr[1];
9424         struct wireless_dev *wdev = dev->ieee80211_ptr;
9425         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
9426         struct cfg80211_gtk_rekey_data rekey_data;
9427         int err;
9428
9429         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
9430                 return -EINVAL;
9431
9432         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
9433                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
9434                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
9435                         nl80211_rekey_policy);
9436         if (err)
9437                 return err;
9438
9439         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
9440                 return -ERANGE;
9441         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
9442                 return -ERANGE;
9443         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
9444                 return -ERANGE;
9445
9446         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
9447         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
9448         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
9449
9450         wdev_lock(wdev);
9451         if (!wdev->current_bss) {
9452                 err = -ENOTCONN;
9453                 goto out;
9454         }
9455
9456         if (!rdev->ops->set_rekey_data) {
9457                 err = -EOPNOTSUPP;
9458                 goto out;
9459         }
9460
9461         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
9462  out:
9463         wdev_unlock(wdev);
9464         return err;
9465 }
9466
9467 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
9468                                              struct genl_info *info)
9469 {
9470         struct net_device *dev = info->user_ptr[1];
9471         struct wireless_dev *wdev = dev->ieee80211_ptr;
9472
9473         if (wdev->iftype != NL80211_IFTYPE_AP &&
9474             wdev->iftype != NL80211_IFTYPE_P2P_GO)
9475                 return -EINVAL;
9476
9477         if (wdev->ap_unexpected_nlportid)
9478                 return -EBUSY;
9479
9480         wdev->ap_unexpected_nlportid = info->snd_portid;
9481         return 0;
9482 }
9483
9484 static int nl80211_probe_client(struct sk_buff *skb,
9485                                 struct genl_info *info)
9486 {
9487         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9488         struct net_device *dev = info->user_ptr[1];
9489         struct wireless_dev *wdev = dev->ieee80211_ptr;
9490         struct sk_buff *msg;
9491         void *hdr;
9492         const u8 *addr;
9493         u64 cookie;
9494         int err;
9495
9496         if (wdev->iftype != NL80211_IFTYPE_AP &&
9497             wdev->iftype != NL80211_IFTYPE_P2P_GO)
9498                 return -EOPNOTSUPP;
9499
9500         if (!info->attrs[NL80211_ATTR_MAC])
9501                 return -EINVAL;
9502
9503         if (!rdev->ops->probe_client)
9504                 return -EOPNOTSUPP;
9505
9506         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9507         if (!msg)
9508                 return -ENOMEM;
9509
9510         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9511                              NL80211_CMD_PROBE_CLIENT);
9512         if (!hdr) {
9513                 err = -ENOBUFS;
9514                 goto free_msg;
9515         }
9516
9517         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
9518
9519         err = rdev_probe_client(rdev, dev, addr, &cookie);
9520         if (err)
9521                 goto free_msg;
9522
9523         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9524                 goto nla_put_failure;
9525
9526         genlmsg_end(msg, hdr);
9527
9528         return genlmsg_reply(msg, info);
9529
9530  nla_put_failure:
9531         err = -ENOBUFS;
9532  free_msg:
9533         nlmsg_free(msg);
9534         return err;
9535 }
9536
9537 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
9538 {
9539         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9540         struct cfg80211_beacon_registration *reg, *nreg;
9541         int rv;
9542
9543         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
9544                 return -EOPNOTSUPP;
9545
9546         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
9547         if (!nreg)
9548                 return -ENOMEM;
9549
9550         /* First, check if already registered. */
9551         spin_lock_bh(&rdev->beacon_registrations_lock);
9552         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9553                 if (reg->nlportid == info->snd_portid) {
9554                         rv = -EALREADY;
9555                         goto out_err;
9556                 }
9557         }
9558         /* Add it to the list */
9559         nreg->nlportid = info->snd_portid;
9560         list_add(&nreg->list, &rdev->beacon_registrations);
9561
9562         spin_unlock_bh(&rdev->beacon_registrations_lock);
9563
9564         return 0;
9565 out_err:
9566         spin_unlock_bh(&rdev->beacon_registrations_lock);
9567         kfree(nreg);
9568         return rv;
9569 }
9570
9571 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
9572 {
9573         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9574         struct wireless_dev *wdev = info->user_ptr[1];
9575         int err;
9576
9577         if (!rdev->ops->start_p2p_device)
9578                 return -EOPNOTSUPP;
9579
9580         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9581                 return -EOPNOTSUPP;
9582
9583         if (wdev->p2p_started)
9584                 return 0;
9585
9586         if (rfkill_blocked(rdev->rfkill))
9587                 return -ERFKILL;
9588
9589         err = rdev_start_p2p_device(rdev, wdev);
9590         if (err)
9591                 return err;
9592
9593         wdev->p2p_started = true;
9594         rdev->opencount++;
9595
9596         return 0;
9597 }
9598
9599 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
9600 {
9601         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9602         struct wireless_dev *wdev = info->user_ptr[1];
9603
9604         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9605                 return -EOPNOTSUPP;
9606
9607         if (!rdev->ops->stop_p2p_device)
9608                 return -EOPNOTSUPP;
9609
9610         cfg80211_stop_p2p_device(rdev, wdev);
9611
9612         return 0;
9613 }
9614
9615 static int nl80211_get_protocol_features(struct sk_buff *skb,
9616                                          struct genl_info *info)
9617 {
9618         void *hdr;
9619         struct sk_buff *msg;
9620
9621         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9622         if (!msg)
9623                 return -ENOMEM;
9624
9625         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9626                              NL80211_CMD_GET_PROTOCOL_FEATURES);
9627         if (!hdr)
9628                 goto nla_put_failure;
9629
9630         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
9631                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
9632                 goto nla_put_failure;
9633
9634         genlmsg_end(msg, hdr);
9635         return genlmsg_reply(msg, info);
9636
9637  nla_put_failure:
9638         kfree_skb(msg);
9639         return -ENOBUFS;
9640 }
9641
9642 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
9643 {
9644         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9645         struct cfg80211_update_ft_ies_params ft_params;
9646         struct net_device *dev = info->user_ptr[1];
9647
9648         if (!rdev->ops->update_ft_ies)
9649                 return -EOPNOTSUPP;
9650
9651         if (!info->attrs[NL80211_ATTR_MDID] ||
9652             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
9653                 return -EINVAL;
9654
9655         memset(&ft_params, 0, sizeof(ft_params));
9656         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
9657         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
9658         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
9659
9660         return rdev_update_ft_ies(rdev, dev, &ft_params);
9661 }
9662
9663 static int nl80211_crit_protocol_start(struct sk_buff *skb,
9664                                        struct genl_info *info)
9665 {
9666         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9667         struct wireless_dev *wdev = info->user_ptr[1];
9668         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
9669         u16 duration;
9670         int ret;
9671
9672         if (!rdev->ops->crit_proto_start)
9673                 return -EOPNOTSUPP;
9674
9675         if (WARN_ON(!rdev->ops->crit_proto_stop))
9676                 return -EINVAL;
9677
9678         if (rdev->crit_proto_nlportid)
9679                 return -EBUSY;
9680
9681         /* determine protocol if provided */
9682         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
9683                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
9684
9685         if (proto >= NUM_NL80211_CRIT_PROTO)
9686                 return -EINVAL;
9687
9688         /* timeout must be provided */
9689         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
9690                 return -EINVAL;
9691
9692         duration =
9693                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
9694
9695         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
9696                 return -ERANGE;
9697
9698         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
9699         if (!ret)
9700                 rdev->crit_proto_nlportid = info->snd_portid;
9701
9702         return ret;
9703 }
9704
9705 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
9706                                       struct genl_info *info)
9707 {
9708         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9709         struct wireless_dev *wdev = info->user_ptr[1];
9710
9711         if (!rdev->ops->crit_proto_stop)
9712                 return -EOPNOTSUPP;
9713
9714         if (rdev->crit_proto_nlportid) {
9715                 rdev->crit_proto_nlportid = 0;
9716                 rdev_crit_proto_stop(rdev, wdev);
9717         }
9718         return 0;
9719 }
9720
9721 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
9722 {
9723         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9724         struct wireless_dev *wdev =
9725                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
9726         int i, err;
9727         u32 vid, subcmd;
9728
9729         if (!rdev->wiphy.vendor_commands)
9730                 return -EOPNOTSUPP;
9731
9732         if (IS_ERR(wdev)) {
9733                 err = PTR_ERR(wdev);
9734                 if (err != -EINVAL)
9735                         return err;
9736                 wdev = NULL;
9737         } else if (wdev->wiphy != &rdev->wiphy) {
9738                 return -EINVAL;
9739         }
9740
9741         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
9742             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
9743                 return -EINVAL;
9744
9745         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
9746         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
9747         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
9748                 const struct wiphy_vendor_command *vcmd;
9749                 void *data = NULL;
9750                 int len = 0;
9751
9752                 vcmd = &rdev->wiphy.vendor_commands[i];
9753
9754                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
9755                         continue;
9756
9757                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
9758                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
9759                         if (!wdev)
9760                                 return -EINVAL;
9761                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
9762                             !wdev->netdev)
9763                                 return -EINVAL;
9764
9765                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
9766                                 if (wdev->netdev &&
9767                                     !netif_running(wdev->netdev))
9768                                         return -ENETDOWN;
9769                                 if (!wdev->netdev && !wdev->p2p_started)
9770                                         return -ENETDOWN;
9771                         }
9772                 } else {
9773                         wdev = NULL;
9774                 }
9775
9776                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
9777                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
9778                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
9779                 }
9780
9781                 rdev->cur_cmd_info = info;
9782                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
9783                                                           data, len);
9784                 rdev->cur_cmd_info = NULL;
9785                 return err;
9786         }
9787
9788         return -EOPNOTSUPP;
9789 }
9790
9791 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
9792                                            enum nl80211_commands cmd,
9793                                            enum nl80211_attrs attr,
9794                                            int approxlen)
9795 {
9796         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
9797
9798         if (WARN_ON(!rdev->cur_cmd_info))
9799                 return NULL;
9800
9801         return __cfg80211_alloc_vendor_skb(rdev, approxlen,
9802                                            rdev->cur_cmd_info->snd_portid,
9803                                            rdev->cur_cmd_info->snd_seq,
9804                                            cmd, attr, NULL, GFP_KERNEL);
9805 }
9806 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
9807
9808 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
9809 {
9810         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
9811         void *hdr = ((void **)skb->cb)[1];
9812         struct nlattr *data = ((void **)skb->cb)[2];
9813
9814         /* clear CB data for netlink core to own from now on */
9815         memset(skb->cb, 0, sizeof(skb->cb));
9816
9817         if (WARN_ON(!rdev->cur_cmd_info)) {
9818                 kfree_skb(skb);
9819                 return -EINVAL;
9820         }
9821
9822         nla_nest_end(skb, data);
9823         genlmsg_end(skb, hdr);
9824         return genlmsg_reply(skb, rdev->cur_cmd_info);
9825 }
9826 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
9827
9828
9829 static int nl80211_set_qos_map(struct sk_buff *skb,
9830                                struct genl_info *info)
9831 {
9832         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9833         struct cfg80211_qos_map *qos_map = NULL;
9834         struct net_device *dev = info->user_ptr[1];
9835         u8 *pos, len, num_des, des_len, des;
9836         int ret;
9837
9838         if (!rdev->ops->set_qos_map)
9839                 return -EOPNOTSUPP;
9840
9841         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
9842                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
9843                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
9844
9845                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
9846                     len > IEEE80211_QOS_MAP_LEN_MAX)
9847                         return -EINVAL;
9848
9849                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
9850                 if (!qos_map)
9851                         return -ENOMEM;
9852
9853                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
9854                 if (num_des) {
9855                         des_len = num_des *
9856                                 sizeof(struct cfg80211_dscp_exception);
9857                         memcpy(qos_map->dscp_exception, pos, des_len);
9858                         qos_map->num_des = num_des;
9859                         for (des = 0; des < num_des; des++) {
9860                                 if (qos_map->dscp_exception[des].up > 7) {
9861                                         kfree(qos_map);
9862                                         return -EINVAL;
9863                                 }
9864                         }
9865                         pos += des_len;
9866                 }
9867                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
9868         }
9869
9870         wdev_lock(dev->ieee80211_ptr);
9871         ret = nl80211_key_allowed(dev->ieee80211_ptr);
9872         if (!ret)
9873                 ret = rdev_set_qos_map(rdev, dev, qos_map);
9874         wdev_unlock(dev->ieee80211_ptr);
9875
9876         kfree(qos_map);
9877         return ret;
9878 }
9879
9880 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
9881 {
9882         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9883         struct net_device *dev = info->user_ptr[1];
9884         struct wireless_dev *wdev = dev->ieee80211_ptr;
9885         const u8 *peer;
9886         u8 tsid, up;
9887         u16 admitted_time = 0;
9888         int err;
9889
9890         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
9891                 return -EOPNOTSUPP;
9892
9893         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
9894             !info->attrs[NL80211_ATTR_USER_PRIO])
9895                 return -EINVAL;
9896
9897         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
9898         if (tsid >= IEEE80211_NUM_TIDS)
9899                 return -EINVAL;
9900
9901         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
9902         if (up >= IEEE80211_NUM_UPS)
9903                 return -EINVAL;
9904
9905         /* WMM uses TIDs 0-7 even for TSPEC */
9906         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
9907                 /* TODO: handle 802.11 TSPEC/admission control
9908                  * need more attributes for that (e.g. BA session requirement);
9909                  * change the WMM adminssion test above to allow both then
9910                  */
9911                 return -EINVAL;
9912         }
9913
9914         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
9915
9916         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
9917                 admitted_time =
9918                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
9919                 if (!admitted_time)
9920                         return -EINVAL;
9921         }
9922
9923         wdev_lock(wdev);
9924         switch (wdev->iftype) {
9925         case NL80211_IFTYPE_STATION:
9926         case NL80211_IFTYPE_P2P_CLIENT:
9927                 if (wdev->current_bss)
9928                         break;
9929                 err = -ENOTCONN;
9930                 goto out;
9931         default:
9932                 err = -EOPNOTSUPP;
9933                 goto out;
9934         }
9935
9936         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
9937
9938  out:
9939         wdev_unlock(wdev);
9940         return err;
9941 }
9942
9943 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
9944 {
9945         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9946         struct net_device *dev = info->user_ptr[1];
9947         struct wireless_dev *wdev = dev->ieee80211_ptr;
9948         const u8 *peer;
9949         u8 tsid;
9950         int err;
9951
9952         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
9953                 return -EINVAL;
9954
9955         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
9956         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
9957
9958         wdev_lock(wdev);
9959         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
9960         wdev_unlock(wdev);
9961
9962         return err;
9963 }
9964
9965 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
9966                                        struct genl_info *info)
9967 {
9968         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9969         struct net_device *dev = info->user_ptr[1];
9970         struct wireless_dev *wdev = dev->ieee80211_ptr;
9971         struct cfg80211_chan_def chandef = {};
9972         const u8 *addr;
9973         u8 oper_class;
9974         int err;
9975
9976         if (!rdev->ops->tdls_channel_switch ||
9977             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
9978                 return -EOPNOTSUPP;
9979
9980         switch (dev->ieee80211_ptr->iftype) {
9981         case NL80211_IFTYPE_STATION:
9982         case NL80211_IFTYPE_P2P_CLIENT:
9983                 break;
9984         default:
9985                 return -EOPNOTSUPP;
9986         }
9987
9988         if (!info->attrs[NL80211_ATTR_MAC] ||
9989             !info->attrs[NL80211_ATTR_OPER_CLASS])
9990                 return -EINVAL;
9991
9992         err = nl80211_parse_chandef(rdev, info, &chandef);
9993         if (err)
9994                 return err;
9995
9996         /*
9997          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
9998          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
9999          * specification is not defined for them.
10000          */
10001         if (chandef.chan->band == IEEE80211_BAND_2GHZ &&
10002             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
10003             chandef.width != NL80211_CHAN_WIDTH_20)
10004                 return -EINVAL;
10005
10006         /* we will be active on the TDLS link */
10007         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef, wdev->iftype))
10008                 return -EINVAL;
10009
10010         /* don't allow switching to DFS channels */
10011         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
10012                 return -EINVAL;
10013
10014         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10015         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
10016
10017         wdev_lock(wdev);
10018         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
10019         wdev_unlock(wdev);
10020
10021         return err;
10022 }
10023
10024 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
10025                                               struct genl_info *info)
10026 {
10027         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10028         struct net_device *dev = info->user_ptr[1];
10029         struct wireless_dev *wdev = dev->ieee80211_ptr;
10030         const u8 *addr;
10031
10032         if (!rdev->ops->tdls_channel_switch ||
10033             !rdev->ops->tdls_cancel_channel_switch ||
10034             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10035                 return -EOPNOTSUPP;
10036
10037         switch (dev->ieee80211_ptr->iftype) {
10038         case NL80211_IFTYPE_STATION:
10039         case NL80211_IFTYPE_P2P_CLIENT:
10040                 break;
10041         default:
10042                 return -EOPNOTSUPP;
10043         }
10044
10045         if (!info->attrs[NL80211_ATTR_MAC])
10046                 return -EINVAL;
10047
10048         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10049
10050         wdev_lock(wdev);
10051         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
10052         wdev_unlock(wdev);
10053
10054         return 0;
10055 }
10056
10057 #define NL80211_FLAG_NEED_WIPHY         0x01
10058 #define NL80211_FLAG_NEED_NETDEV        0x02
10059 #define NL80211_FLAG_NEED_RTNL          0x04
10060 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
10061 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
10062                                          NL80211_FLAG_CHECK_NETDEV_UP)
10063 #define NL80211_FLAG_NEED_WDEV          0x10
10064 /* If a netdev is associated, it must be UP, P2P must be started */
10065 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
10066                                          NL80211_FLAG_CHECK_NETDEV_UP)
10067 #define NL80211_FLAG_CLEAR_SKB          0x20
10068
10069 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
10070                             struct genl_info *info)
10071 {
10072         struct cfg80211_registered_device *rdev;
10073         struct wireless_dev *wdev;
10074         struct net_device *dev;
10075         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
10076
10077         if (rtnl)
10078                 rtnl_lock();
10079
10080         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
10081                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
10082                 if (IS_ERR(rdev)) {
10083                         if (rtnl)
10084                                 rtnl_unlock();
10085                         return PTR_ERR(rdev);
10086                 }
10087                 info->user_ptr[0] = rdev;
10088         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
10089                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10090                 ASSERT_RTNL();
10091
10092                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
10093                                                   info->attrs);
10094                 if (IS_ERR(wdev)) {
10095                         if (rtnl)
10096                                 rtnl_unlock();
10097                         return PTR_ERR(wdev);
10098                 }
10099
10100                 dev = wdev->netdev;
10101                 rdev = wiphy_to_rdev(wdev->wiphy);
10102
10103                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
10104                         if (!dev) {
10105                                 if (rtnl)
10106                                         rtnl_unlock();
10107                                 return -EINVAL;
10108                         }
10109
10110                         info->user_ptr[1] = dev;
10111                 } else {
10112                         info->user_ptr[1] = wdev;
10113                 }
10114
10115                 if (dev) {
10116                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
10117                             !netif_running(dev)) {
10118                                 if (rtnl)
10119                                         rtnl_unlock();
10120                                 return -ENETDOWN;
10121                         }
10122
10123                         dev_hold(dev);
10124                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
10125                         if (!wdev->p2p_started) {
10126                                 if (rtnl)
10127                                         rtnl_unlock();
10128                                 return -ENETDOWN;
10129                         }
10130                 }
10131
10132                 info->user_ptr[0] = rdev;
10133         }
10134
10135         return 0;
10136 }
10137
10138 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
10139                               struct genl_info *info)
10140 {
10141         if (info->user_ptr[1]) {
10142                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10143                         struct wireless_dev *wdev = info->user_ptr[1];
10144
10145                         if (wdev->netdev)
10146                                 dev_put(wdev->netdev);
10147                 } else {
10148                         dev_put(info->user_ptr[1]);
10149                 }
10150         }
10151
10152         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
10153                 rtnl_unlock();
10154
10155         /* If needed, clear the netlink message payload from the SKB
10156          * as it might contain key data that shouldn't stick around on
10157          * the heap after the SKB is freed. The netlink message header
10158          * is still needed for further processing, so leave it intact.
10159          */
10160         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
10161                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
10162
10163                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
10164         }
10165 }
10166
10167 static const struct genl_ops nl80211_ops[] = {
10168         {
10169                 .cmd = NL80211_CMD_GET_WIPHY,
10170                 .doit = nl80211_get_wiphy,
10171                 .dumpit = nl80211_dump_wiphy,
10172                 .done = nl80211_dump_wiphy_done,
10173                 .policy = nl80211_policy,
10174                 /* can be retrieved by unprivileged users */
10175                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10176                                   NL80211_FLAG_NEED_RTNL,
10177         },
10178         {
10179                 .cmd = NL80211_CMD_SET_WIPHY,
10180                 .doit = nl80211_set_wiphy,
10181                 .policy = nl80211_policy,
10182                 .flags = GENL_ADMIN_PERM,
10183                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10184         },
10185         {
10186                 .cmd = NL80211_CMD_GET_INTERFACE,
10187                 .doit = nl80211_get_interface,
10188                 .dumpit = nl80211_dump_interface,
10189                 .policy = nl80211_policy,
10190                 /* can be retrieved by unprivileged users */
10191                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10192                                   NL80211_FLAG_NEED_RTNL,
10193         },
10194         {
10195                 .cmd = NL80211_CMD_SET_INTERFACE,
10196                 .doit = nl80211_set_interface,
10197                 .policy = nl80211_policy,
10198                 .flags = GENL_ADMIN_PERM,
10199                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10200                                   NL80211_FLAG_NEED_RTNL,
10201         },
10202         {
10203                 .cmd = NL80211_CMD_NEW_INTERFACE,
10204                 .doit = nl80211_new_interface,
10205                 .policy = nl80211_policy,
10206                 .flags = GENL_ADMIN_PERM,
10207                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10208                                   NL80211_FLAG_NEED_RTNL,
10209         },
10210         {
10211                 .cmd = NL80211_CMD_DEL_INTERFACE,
10212                 .doit = nl80211_del_interface,
10213                 .policy = nl80211_policy,
10214                 .flags = GENL_ADMIN_PERM,
10215                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10216                                   NL80211_FLAG_NEED_RTNL,
10217         },
10218         {
10219                 .cmd = NL80211_CMD_GET_KEY,
10220                 .doit = nl80211_get_key,
10221                 .policy = nl80211_policy,
10222                 .flags = GENL_ADMIN_PERM,
10223                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10224                                   NL80211_FLAG_NEED_RTNL,
10225         },
10226         {
10227                 .cmd = NL80211_CMD_SET_KEY,
10228                 .doit = nl80211_set_key,
10229                 .policy = nl80211_policy,
10230                 .flags = GENL_ADMIN_PERM,
10231                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10232                                   NL80211_FLAG_NEED_RTNL |
10233                                   NL80211_FLAG_CLEAR_SKB,
10234         },
10235         {
10236                 .cmd = NL80211_CMD_NEW_KEY,
10237                 .doit = nl80211_new_key,
10238                 .policy = nl80211_policy,
10239                 .flags = GENL_ADMIN_PERM,
10240                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10241                                   NL80211_FLAG_NEED_RTNL |
10242                                   NL80211_FLAG_CLEAR_SKB,
10243         },
10244         {
10245                 .cmd = NL80211_CMD_DEL_KEY,
10246                 .doit = nl80211_del_key,
10247                 .policy = nl80211_policy,
10248                 .flags = GENL_ADMIN_PERM,
10249                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10250                                   NL80211_FLAG_NEED_RTNL,
10251         },
10252         {
10253                 .cmd = NL80211_CMD_SET_BEACON,
10254                 .policy = nl80211_policy,
10255                 .flags = GENL_ADMIN_PERM,
10256                 .doit = nl80211_set_beacon,
10257                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10258                                   NL80211_FLAG_NEED_RTNL,
10259         },
10260         {
10261                 .cmd = NL80211_CMD_START_AP,
10262                 .policy = nl80211_policy,
10263                 .flags = GENL_ADMIN_PERM,
10264                 .doit = nl80211_start_ap,
10265                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10266                                   NL80211_FLAG_NEED_RTNL,
10267         },
10268         {
10269                 .cmd = NL80211_CMD_STOP_AP,
10270                 .policy = nl80211_policy,
10271                 .flags = GENL_ADMIN_PERM,
10272                 .doit = nl80211_stop_ap,
10273                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10274                                   NL80211_FLAG_NEED_RTNL,
10275         },
10276         {
10277                 .cmd = NL80211_CMD_GET_STATION,
10278                 .doit = nl80211_get_station,
10279                 .dumpit = nl80211_dump_station,
10280                 .policy = nl80211_policy,
10281                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10282                                   NL80211_FLAG_NEED_RTNL,
10283         },
10284         {
10285                 .cmd = NL80211_CMD_SET_STATION,
10286                 .doit = nl80211_set_station,
10287                 .policy = nl80211_policy,
10288                 .flags = GENL_ADMIN_PERM,
10289                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10290                                   NL80211_FLAG_NEED_RTNL,
10291         },
10292         {
10293                 .cmd = NL80211_CMD_NEW_STATION,
10294                 .doit = nl80211_new_station,
10295                 .policy = nl80211_policy,
10296                 .flags = GENL_ADMIN_PERM,
10297                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10298                                   NL80211_FLAG_NEED_RTNL,
10299         },
10300         {
10301                 .cmd = NL80211_CMD_DEL_STATION,
10302                 .doit = nl80211_del_station,
10303                 .policy = nl80211_policy,
10304                 .flags = GENL_ADMIN_PERM,
10305                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10306                                   NL80211_FLAG_NEED_RTNL,
10307         },
10308         {
10309                 .cmd = NL80211_CMD_GET_MPATH,
10310                 .doit = nl80211_get_mpath,
10311                 .dumpit = nl80211_dump_mpath,
10312                 .policy = nl80211_policy,
10313                 .flags = GENL_ADMIN_PERM,
10314                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10315                                   NL80211_FLAG_NEED_RTNL,
10316         },
10317         {
10318                 .cmd = NL80211_CMD_GET_MPP,
10319                 .doit = nl80211_get_mpp,
10320                 .dumpit = nl80211_dump_mpp,
10321                 .policy = nl80211_policy,
10322                 .flags = GENL_ADMIN_PERM,
10323                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10324                                   NL80211_FLAG_NEED_RTNL,
10325         },
10326         {
10327                 .cmd = NL80211_CMD_SET_MPATH,
10328                 .doit = nl80211_set_mpath,
10329                 .policy = nl80211_policy,
10330                 .flags = GENL_ADMIN_PERM,
10331                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10332                                   NL80211_FLAG_NEED_RTNL,
10333         },
10334         {
10335                 .cmd = NL80211_CMD_NEW_MPATH,
10336                 .doit = nl80211_new_mpath,
10337                 .policy = nl80211_policy,
10338                 .flags = GENL_ADMIN_PERM,
10339                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10340                                   NL80211_FLAG_NEED_RTNL,
10341         },
10342         {
10343                 .cmd = NL80211_CMD_DEL_MPATH,
10344                 .doit = nl80211_del_mpath,
10345                 .policy = nl80211_policy,
10346                 .flags = GENL_ADMIN_PERM,
10347                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10348                                   NL80211_FLAG_NEED_RTNL,
10349         },
10350         {
10351                 .cmd = NL80211_CMD_SET_BSS,
10352                 .doit = nl80211_set_bss,
10353                 .policy = nl80211_policy,
10354                 .flags = GENL_ADMIN_PERM,
10355                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10356                                   NL80211_FLAG_NEED_RTNL,
10357         },
10358         {
10359                 .cmd = NL80211_CMD_GET_REG,
10360                 .doit = nl80211_get_reg_do,
10361                 .dumpit = nl80211_get_reg_dump,
10362                 .policy = nl80211_policy,
10363                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10364                 /* can be retrieved by unprivileged users */
10365         },
10366         {
10367                 .cmd = NL80211_CMD_SET_REG,
10368                 .doit = nl80211_set_reg,
10369                 .policy = nl80211_policy,
10370                 .flags = GENL_ADMIN_PERM,
10371                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10372         },
10373         {
10374                 .cmd = NL80211_CMD_REQ_SET_REG,
10375                 .doit = nl80211_req_set_reg,
10376                 .policy = nl80211_policy,
10377                 .flags = GENL_ADMIN_PERM,
10378         },
10379         {
10380                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
10381                 .doit = nl80211_get_mesh_config,
10382                 .policy = nl80211_policy,
10383                 /* can be retrieved by unprivileged users */
10384                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10385                                   NL80211_FLAG_NEED_RTNL,
10386         },
10387         {
10388                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
10389                 .doit = nl80211_update_mesh_config,
10390                 .policy = nl80211_policy,
10391                 .flags = GENL_ADMIN_PERM,
10392                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10393                                   NL80211_FLAG_NEED_RTNL,
10394         },
10395         {
10396                 .cmd = NL80211_CMD_TRIGGER_SCAN,
10397                 .doit = nl80211_trigger_scan,
10398                 .policy = nl80211_policy,
10399                 .flags = GENL_ADMIN_PERM,
10400                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10401                                   NL80211_FLAG_NEED_RTNL,
10402         },
10403         {
10404                 .cmd = NL80211_CMD_GET_SCAN,
10405                 .policy = nl80211_policy,
10406                 .dumpit = nl80211_dump_scan,
10407         },
10408         {
10409                 .cmd = NL80211_CMD_START_SCHED_SCAN,
10410                 .doit = nl80211_start_sched_scan,
10411                 .policy = nl80211_policy,
10412                 .flags = GENL_ADMIN_PERM,
10413                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10414                                   NL80211_FLAG_NEED_RTNL,
10415         },
10416         {
10417                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
10418                 .doit = nl80211_stop_sched_scan,
10419                 .policy = nl80211_policy,
10420                 .flags = GENL_ADMIN_PERM,
10421                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10422                                   NL80211_FLAG_NEED_RTNL,
10423         },
10424         {
10425                 .cmd = NL80211_CMD_AUTHENTICATE,
10426                 .doit = nl80211_authenticate,
10427                 .policy = nl80211_policy,
10428                 .flags = GENL_ADMIN_PERM,
10429                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10430                                   NL80211_FLAG_NEED_RTNL |
10431                                   NL80211_FLAG_CLEAR_SKB,
10432         },
10433         {
10434                 .cmd = NL80211_CMD_ASSOCIATE,
10435                 .doit = nl80211_associate,
10436                 .policy = nl80211_policy,
10437                 .flags = GENL_ADMIN_PERM,
10438                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10439                                   NL80211_FLAG_NEED_RTNL,
10440         },
10441         {
10442                 .cmd = NL80211_CMD_DEAUTHENTICATE,
10443                 .doit = nl80211_deauthenticate,
10444                 .policy = nl80211_policy,
10445                 .flags = GENL_ADMIN_PERM,
10446                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10447                                   NL80211_FLAG_NEED_RTNL,
10448         },
10449         {
10450                 .cmd = NL80211_CMD_DISASSOCIATE,
10451                 .doit = nl80211_disassociate,
10452                 .policy = nl80211_policy,
10453                 .flags = GENL_ADMIN_PERM,
10454                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10455                                   NL80211_FLAG_NEED_RTNL,
10456         },
10457         {
10458                 .cmd = NL80211_CMD_JOIN_IBSS,
10459                 .doit = nl80211_join_ibss,
10460                 .policy = nl80211_policy,
10461                 .flags = GENL_ADMIN_PERM,
10462                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10463                                   NL80211_FLAG_NEED_RTNL,
10464         },
10465         {
10466                 .cmd = NL80211_CMD_LEAVE_IBSS,
10467                 .doit = nl80211_leave_ibss,
10468                 .policy = nl80211_policy,
10469                 .flags = GENL_ADMIN_PERM,
10470                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10471                                   NL80211_FLAG_NEED_RTNL,
10472         },
10473 #ifdef CONFIG_NL80211_TESTMODE
10474         {
10475                 .cmd = NL80211_CMD_TESTMODE,
10476                 .doit = nl80211_testmode_do,
10477                 .dumpit = nl80211_testmode_dump,
10478                 .policy = nl80211_policy,
10479                 .flags = GENL_ADMIN_PERM,
10480                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10481                                   NL80211_FLAG_NEED_RTNL,
10482         },
10483 #endif
10484         {
10485                 .cmd = NL80211_CMD_CONNECT,
10486                 .doit = nl80211_connect,
10487                 .policy = nl80211_policy,
10488                 .flags = GENL_ADMIN_PERM,
10489                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10490                                   NL80211_FLAG_NEED_RTNL,
10491         },
10492         {
10493                 .cmd = NL80211_CMD_DISCONNECT,
10494                 .doit = nl80211_disconnect,
10495                 .policy = nl80211_policy,
10496                 .flags = GENL_ADMIN_PERM,
10497                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10498                                   NL80211_FLAG_NEED_RTNL,
10499         },
10500         {
10501                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
10502                 .doit = nl80211_wiphy_netns,
10503                 .policy = nl80211_policy,
10504                 .flags = GENL_ADMIN_PERM,
10505                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10506                                   NL80211_FLAG_NEED_RTNL,
10507         },
10508         {
10509                 .cmd = NL80211_CMD_GET_SURVEY,
10510                 .policy = nl80211_policy,
10511                 .dumpit = nl80211_dump_survey,
10512         },
10513         {
10514                 .cmd = NL80211_CMD_SET_PMKSA,
10515                 .doit = nl80211_setdel_pmksa,
10516                 .policy = nl80211_policy,
10517                 .flags = GENL_ADMIN_PERM,
10518                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10519                                   NL80211_FLAG_NEED_RTNL,
10520         },
10521         {
10522                 .cmd = NL80211_CMD_DEL_PMKSA,
10523                 .doit = nl80211_setdel_pmksa,
10524                 .policy = nl80211_policy,
10525                 .flags = GENL_ADMIN_PERM,
10526                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10527                                   NL80211_FLAG_NEED_RTNL,
10528         },
10529         {
10530                 .cmd = NL80211_CMD_FLUSH_PMKSA,
10531                 .doit = nl80211_flush_pmksa,
10532                 .policy = nl80211_policy,
10533                 .flags = GENL_ADMIN_PERM,
10534                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10535                                   NL80211_FLAG_NEED_RTNL,
10536         },
10537         {
10538                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
10539                 .doit = nl80211_remain_on_channel,
10540                 .policy = nl80211_policy,
10541                 .flags = GENL_ADMIN_PERM,
10542                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10543                                   NL80211_FLAG_NEED_RTNL,
10544         },
10545         {
10546                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
10547                 .doit = nl80211_cancel_remain_on_channel,
10548                 .policy = nl80211_policy,
10549                 .flags = GENL_ADMIN_PERM,
10550                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10551                                   NL80211_FLAG_NEED_RTNL,
10552         },
10553         {
10554                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
10555                 .doit = nl80211_set_tx_bitrate_mask,
10556                 .policy = nl80211_policy,
10557                 .flags = GENL_ADMIN_PERM,
10558                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10559                                   NL80211_FLAG_NEED_RTNL,
10560         },
10561         {
10562                 .cmd = NL80211_CMD_REGISTER_FRAME,
10563                 .doit = nl80211_register_mgmt,
10564                 .policy = nl80211_policy,
10565                 .flags = GENL_ADMIN_PERM,
10566                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10567                                   NL80211_FLAG_NEED_RTNL,
10568         },
10569         {
10570                 .cmd = NL80211_CMD_FRAME,
10571                 .doit = nl80211_tx_mgmt,
10572                 .policy = nl80211_policy,
10573                 .flags = GENL_ADMIN_PERM,
10574                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10575                                   NL80211_FLAG_NEED_RTNL,
10576         },
10577         {
10578                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
10579                 .doit = nl80211_tx_mgmt_cancel_wait,
10580                 .policy = nl80211_policy,
10581                 .flags = GENL_ADMIN_PERM,
10582                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10583                                   NL80211_FLAG_NEED_RTNL,
10584         },
10585         {
10586                 .cmd = NL80211_CMD_SET_POWER_SAVE,
10587                 .doit = nl80211_set_power_save,
10588                 .policy = nl80211_policy,
10589                 .flags = GENL_ADMIN_PERM,
10590                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10591                                   NL80211_FLAG_NEED_RTNL,
10592         },
10593         {
10594                 .cmd = NL80211_CMD_GET_POWER_SAVE,
10595                 .doit = nl80211_get_power_save,
10596                 .policy = nl80211_policy,
10597                 /* can be retrieved by unprivileged users */
10598                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10599                                   NL80211_FLAG_NEED_RTNL,
10600         },
10601         {
10602                 .cmd = NL80211_CMD_SET_CQM,
10603                 .doit = nl80211_set_cqm,
10604                 .policy = nl80211_policy,
10605                 .flags = GENL_ADMIN_PERM,
10606                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10607                                   NL80211_FLAG_NEED_RTNL,
10608         },
10609         {
10610                 .cmd = NL80211_CMD_SET_CHANNEL,
10611                 .doit = nl80211_set_channel,
10612                 .policy = nl80211_policy,
10613                 .flags = GENL_ADMIN_PERM,
10614                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10615                                   NL80211_FLAG_NEED_RTNL,
10616         },
10617         {
10618                 .cmd = NL80211_CMD_SET_WDS_PEER,
10619                 .doit = nl80211_set_wds_peer,
10620                 .policy = nl80211_policy,
10621                 .flags = GENL_ADMIN_PERM,
10622                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10623                                   NL80211_FLAG_NEED_RTNL,
10624         },
10625         {
10626                 .cmd = NL80211_CMD_JOIN_MESH,
10627                 .doit = nl80211_join_mesh,
10628                 .policy = nl80211_policy,
10629                 .flags = GENL_ADMIN_PERM,
10630                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10631                                   NL80211_FLAG_NEED_RTNL,
10632         },
10633         {
10634                 .cmd = NL80211_CMD_LEAVE_MESH,
10635                 .doit = nl80211_leave_mesh,
10636                 .policy = nl80211_policy,
10637                 .flags = GENL_ADMIN_PERM,
10638                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10639                                   NL80211_FLAG_NEED_RTNL,
10640         },
10641         {
10642                 .cmd = NL80211_CMD_JOIN_OCB,
10643                 .doit = nl80211_join_ocb,
10644                 .policy = nl80211_policy,
10645                 .flags = GENL_ADMIN_PERM,
10646                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10647                                   NL80211_FLAG_NEED_RTNL,
10648         },
10649         {
10650                 .cmd = NL80211_CMD_LEAVE_OCB,
10651                 .doit = nl80211_leave_ocb,
10652                 .policy = nl80211_policy,
10653                 .flags = GENL_ADMIN_PERM,
10654                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10655                                   NL80211_FLAG_NEED_RTNL,
10656         },
10657 #ifdef CONFIG_PM
10658         {
10659                 .cmd = NL80211_CMD_GET_WOWLAN,
10660                 .doit = nl80211_get_wowlan,
10661                 .policy = nl80211_policy,
10662                 /* can be retrieved by unprivileged users */
10663                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10664                                   NL80211_FLAG_NEED_RTNL,
10665         },
10666         {
10667                 .cmd = NL80211_CMD_SET_WOWLAN,
10668                 .doit = nl80211_set_wowlan,
10669                 .policy = nl80211_policy,
10670                 .flags = GENL_ADMIN_PERM,
10671                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10672                                   NL80211_FLAG_NEED_RTNL,
10673         },
10674 #endif
10675         {
10676                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
10677                 .doit = nl80211_set_rekey_data,
10678                 .policy = nl80211_policy,
10679                 .flags = GENL_ADMIN_PERM,
10680                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10681                                   NL80211_FLAG_NEED_RTNL |
10682                                   NL80211_FLAG_CLEAR_SKB,
10683         },
10684         {
10685                 .cmd = NL80211_CMD_TDLS_MGMT,
10686                 .doit = nl80211_tdls_mgmt,
10687                 .policy = nl80211_policy,
10688                 .flags = GENL_ADMIN_PERM,
10689                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10690                                   NL80211_FLAG_NEED_RTNL,
10691         },
10692         {
10693                 .cmd = NL80211_CMD_TDLS_OPER,
10694                 .doit = nl80211_tdls_oper,
10695                 .policy = nl80211_policy,
10696                 .flags = GENL_ADMIN_PERM,
10697                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10698                                   NL80211_FLAG_NEED_RTNL,
10699         },
10700         {
10701                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
10702                 .doit = nl80211_register_unexpected_frame,
10703                 .policy = nl80211_policy,
10704                 .flags = GENL_ADMIN_PERM,
10705                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10706                                   NL80211_FLAG_NEED_RTNL,
10707         },
10708         {
10709                 .cmd = NL80211_CMD_PROBE_CLIENT,
10710                 .doit = nl80211_probe_client,
10711                 .policy = nl80211_policy,
10712                 .flags = GENL_ADMIN_PERM,
10713                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10714                                   NL80211_FLAG_NEED_RTNL,
10715         },
10716         {
10717                 .cmd = NL80211_CMD_REGISTER_BEACONS,
10718                 .doit = nl80211_register_beacons,
10719                 .policy = nl80211_policy,
10720                 .flags = GENL_ADMIN_PERM,
10721                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10722                                   NL80211_FLAG_NEED_RTNL,
10723         },
10724         {
10725                 .cmd = NL80211_CMD_SET_NOACK_MAP,
10726                 .doit = nl80211_set_noack_map,
10727                 .policy = nl80211_policy,
10728                 .flags = GENL_ADMIN_PERM,
10729                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10730                                   NL80211_FLAG_NEED_RTNL,
10731         },
10732         {
10733                 .cmd = NL80211_CMD_START_P2P_DEVICE,
10734                 .doit = nl80211_start_p2p_device,
10735                 .policy = nl80211_policy,
10736                 .flags = GENL_ADMIN_PERM,
10737                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10738                                   NL80211_FLAG_NEED_RTNL,
10739         },
10740         {
10741                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
10742                 .doit = nl80211_stop_p2p_device,
10743                 .policy = nl80211_policy,
10744                 .flags = GENL_ADMIN_PERM,
10745                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10746                                   NL80211_FLAG_NEED_RTNL,
10747         },
10748         {
10749                 .cmd = NL80211_CMD_SET_MCAST_RATE,
10750                 .doit = nl80211_set_mcast_rate,
10751                 .policy = nl80211_policy,
10752                 .flags = GENL_ADMIN_PERM,
10753                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10754                                   NL80211_FLAG_NEED_RTNL,
10755         },
10756         {
10757                 .cmd = NL80211_CMD_SET_MAC_ACL,
10758                 .doit = nl80211_set_mac_acl,
10759                 .policy = nl80211_policy,
10760                 .flags = GENL_ADMIN_PERM,
10761                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10762                                   NL80211_FLAG_NEED_RTNL,
10763         },
10764         {
10765                 .cmd = NL80211_CMD_RADAR_DETECT,
10766                 .doit = nl80211_start_radar_detection,
10767                 .policy = nl80211_policy,
10768                 .flags = GENL_ADMIN_PERM,
10769                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10770                                   NL80211_FLAG_NEED_RTNL,
10771         },
10772         {
10773                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
10774                 .doit = nl80211_get_protocol_features,
10775                 .policy = nl80211_policy,
10776         },
10777         {
10778                 .cmd = NL80211_CMD_UPDATE_FT_IES,
10779                 .doit = nl80211_update_ft_ies,
10780                 .policy = nl80211_policy,
10781                 .flags = GENL_ADMIN_PERM,
10782                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10783                                   NL80211_FLAG_NEED_RTNL,
10784         },
10785         {
10786                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
10787                 .doit = nl80211_crit_protocol_start,
10788                 .policy = nl80211_policy,
10789                 .flags = GENL_ADMIN_PERM,
10790                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10791                                   NL80211_FLAG_NEED_RTNL,
10792         },
10793         {
10794                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
10795                 .doit = nl80211_crit_protocol_stop,
10796                 .policy = nl80211_policy,
10797                 .flags = GENL_ADMIN_PERM,
10798                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10799                                   NL80211_FLAG_NEED_RTNL,
10800         },
10801         {
10802                 .cmd = NL80211_CMD_GET_COALESCE,
10803                 .doit = nl80211_get_coalesce,
10804                 .policy = nl80211_policy,
10805                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10806                                   NL80211_FLAG_NEED_RTNL,
10807         },
10808         {
10809                 .cmd = NL80211_CMD_SET_COALESCE,
10810                 .doit = nl80211_set_coalesce,
10811                 .policy = nl80211_policy,
10812                 .flags = GENL_ADMIN_PERM,
10813                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10814                                   NL80211_FLAG_NEED_RTNL,
10815         },
10816         {
10817                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
10818                 .doit = nl80211_channel_switch,
10819                 .policy = nl80211_policy,
10820                 .flags = GENL_ADMIN_PERM,
10821                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10822                                   NL80211_FLAG_NEED_RTNL,
10823         },
10824         {
10825                 .cmd = NL80211_CMD_VENDOR,
10826                 .doit = nl80211_vendor_cmd,
10827                 .policy = nl80211_policy,
10828                 .flags = GENL_ADMIN_PERM,
10829                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10830                                   NL80211_FLAG_NEED_RTNL,
10831         },
10832         {
10833                 .cmd = NL80211_CMD_SET_QOS_MAP,
10834                 .doit = nl80211_set_qos_map,
10835                 .policy = nl80211_policy,
10836                 .flags = GENL_ADMIN_PERM,
10837                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10838                                   NL80211_FLAG_NEED_RTNL,
10839         },
10840         {
10841                 .cmd = NL80211_CMD_ADD_TX_TS,
10842                 .doit = nl80211_add_tx_ts,
10843                 .policy = nl80211_policy,
10844                 .flags = GENL_ADMIN_PERM,
10845                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10846                                   NL80211_FLAG_NEED_RTNL,
10847         },
10848         {
10849                 .cmd = NL80211_CMD_DEL_TX_TS,
10850                 .doit = nl80211_del_tx_ts,
10851                 .policy = nl80211_policy,
10852                 .flags = GENL_ADMIN_PERM,
10853                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10854                                   NL80211_FLAG_NEED_RTNL,
10855         },
10856         {
10857                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
10858                 .doit = nl80211_tdls_channel_switch,
10859                 .policy = nl80211_policy,
10860                 .flags = GENL_ADMIN_PERM,
10861                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10862                                   NL80211_FLAG_NEED_RTNL,
10863         },
10864         {
10865                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
10866                 .doit = nl80211_tdls_cancel_channel_switch,
10867                 .policy = nl80211_policy,
10868                 .flags = GENL_ADMIN_PERM,
10869                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10870                                   NL80211_FLAG_NEED_RTNL,
10871         },
10872 };
10873
10874 /* notification functions */
10875
10876 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
10877                           enum nl80211_commands cmd)
10878 {
10879         struct sk_buff *msg;
10880         struct nl80211_dump_wiphy_state state = {};
10881
10882         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
10883                 cmd != NL80211_CMD_DEL_WIPHY);
10884
10885         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10886         if (!msg)
10887                 return;
10888
10889         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
10890                 nlmsg_free(msg);
10891                 return;
10892         }
10893
10894         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10895                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
10896 }
10897
10898 static int nl80211_add_scan_req(struct sk_buff *msg,
10899                                 struct cfg80211_registered_device *rdev)
10900 {
10901         struct cfg80211_scan_request *req = rdev->scan_req;
10902         struct nlattr *nest;
10903         int i;
10904
10905         if (WARN_ON(!req))
10906                 return 0;
10907
10908         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
10909         if (!nest)
10910                 goto nla_put_failure;
10911         for (i = 0; i < req->n_ssids; i++) {
10912                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
10913                         goto nla_put_failure;
10914         }
10915         nla_nest_end(msg, nest);
10916
10917         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
10918         if (!nest)
10919                 goto nla_put_failure;
10920         for (i = 0; i < req->n_channels; i++) {
10921                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
10922                         goto nla_put_failure;
10923         }
10924         nla_nest_end(msg, nest);
10925
10926         if (req->ie &&
10927             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
10928                 goto nla_put_failure;
10929
10930         if (req->flags &&
10931             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
10932                 goto nla_put_failure;
10933
10934         return 0;
10935  nla_put_failure:
10936         return -ENOBUFS;
10937 }
10938
10939 static int nl80211_send_scan_msg(struct sk_buff *msg,
10940                                  struct cfg80211_registered_device *rdev,
10941                                  struct wireless_dev *wdev,
10942                                  u32 portid, u32 seq, int flags,
10943                                  u32 cmd)
10944 {
10945         void *hdr;
10946
10947         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
10948         if (!hdr)
10949                 return -1;
10950
10951         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10952             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10953                                          wdev->netdev->ifindex)) ||
10954             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10955                 goto nla_put_failure;
10956
10957         /* ignore errors and send incomplete event anyway */
10958         nl80211_add_scan_req(msg, rdev);
10959
10960         return genlmsg_end(msg, hdr);
10961
10962  nla_put_failure:
10963         genlmsg_cancel(msg, hdr);
10964         return -EMSGSIZE;
10965 }
10966
10967 static int
10968 nl80211_send_sched_scan_msg(struct sk_buff *msg,
10969                             struct cfg80211_registered_device *rdev,
10970                             struct net_device *netdev,
10971                             u32 portid, u32 seq, int flags, u32 cmd)
10972 {
10973         void *hdr;
10974
10975         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
10976         if (!hdr)
10977                 return -1;
10978
10979         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10980             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10981                 goto nla_put_failure;
10982
10983         return genlmsg_end(msg, hdr);
10984
10985  nla_put_failure:
10986         genlmsg_cancel(msg, hdr);
10987         return -EMSGSIZE;
10988 }
10989
10990 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
10991                              struct wireless_dev *wdev)
10992 {
10993         struct sk_buff *msg;
10994
10995         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10996         if (!msg)
10997                 return;
10998
10999         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11000                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
11001                 nlmsg_free(msg);
11002                 return;
11003         }
11004
11005         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11006                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11007 }
11008
11009 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
11010                                        struct wireless_dev *wdev, bool aborted)
11011 {
11012         struct sk_buff *msg;
11013
11014         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11015         if (!msg)
11016                 return NULL;
11017
11018         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11019                                   aborted ? NL80211_CMD_SCAN_ABORTED :
11020                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
11021                 nlmsg_free(msg);
11022                 return NULL;
11023         }
11024
11025         return msg;
11026 }
11027
11028 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
11029                               struct sk_buff *msg)
11030 {
11031         if (!msg)
11032                 return;
11033
11034         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11035                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11036 }
11037
11038 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
11039                                      struct net_device *netdev)
11040 {
11041         struct sk_buff *msg;
11042
11043         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11044         if (!msg)
11045                 return;
11046
11047         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
11048                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
11049                 nlmsg_free(msg);
11050                 return;
11051         }
11052
11053         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11054                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11055 }
11056
11057 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
11058                              struct net_device *netdev, u32 cmd)
11059 {
11060         struct sk_buff *msg;
11061
11062         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11063         if (!msg)
11064                 return;
11065
11066         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
11067                 nlmsg_free(msg);
11068                 return;
11069         }
11070
11071         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11072                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11073 }
11074
11075 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
11076                                           struct regulatory_request *request)
11077 {
11078         /* Userspace can always count this one always being set */
11079         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
11080                 goto nla_put_failure;
11081
11082         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
11083                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11084                                NL80211_REGDOM_TYPE_WORLD))
11085                         goto nla_put_failure;
11086         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
11087                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11088                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
11089                         goto nla_put_failure;
11090         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
11091                    request->intersect) {
11092                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11093                                NL80211_REGDOM_TYPE_INTERSECTION))
11094                         goto nla_put_failure;
11095         } else {
11096                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11097                                NL80211_REGDOM_TYPE_COUNTRY) ||
11098                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
11099                                    request->alpha2))
11100                         goto nla_put_failure;
11101         }
11102
11103         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
11104                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
11105
11106                 if (wiphy &&
11107                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
11108                         goto nla_put_failure;
11109
11110                 if (wiphy &&
11111                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
11112                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
11113                         goto nla_put_failure;
11114         }
11115
11116         return true;
11117
11118 nla_put_failure:
11119         return false;
11120 }
11121
11122 /*
11123  * This can happen on global regulatory changes or device specific settings
11124  * based on custom regulatory domains.
11125  */
11126 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
11127                                      struct regulatory_request *request)
11128 {
11129         struct sk_buff *msg;
11130         void *hdr;
11131
11132         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11133         if (!msg)
11134                 return;
11135
11136         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
11137         if (!hdr) {
11138                 nlmsg_free(msg);
11139                 return;
11140         }
11141
11142         if (nl80211_reg_change_event_fill(msg, request) == false)
11143                 goto nla_put_failure;
11144
11145         genlmsg_end(msg, hdr);
11146
11147         rcu_read_lock();
11148         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
11149                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
11150         rcu_read_unlock();
11151
11152         return;
11153
11154 nla_put_failure:
11155         genlmsg_cancel(msg, hdr);
11156         nlmsg_free(msg);
11157 }
11158
11159 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
11160                                     struct net_device *netdev,
11161                                     const u8 *buf, size_t len,
11162                                     enum nl80211_commands cmd, gfp_t gfp,
11163                                     int uapsd_queues)
11164 {
11165         struct sk_buff *msg;
11166         void *hdr;
11167
11168         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11169         if (!msg)
11170                 return;
11171
11172         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11173         if (!hdr) {
11174                 nlmsg_free(msg);
11175                 return;
11176         }
11177
11178         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11179             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11180             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
11181                 goto nla_put_failure;
11182
11183         if (uapsd_queues >= 0) {
11184                 struct nlattr *nla_wmm =
11185                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
11186                 if (!nla_wmm)
11187                         goto nla_put_failure;
11188
11189                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
11190                                uapsd_queues))
11191                         goto nla_put_failure;
11192
11193                 nla_nest_end(msg, nla_wmm);
11194         }
11195
11196         genlmsg_end(msg, hdr);
11197
11198         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11199                                 NL80211_MCGRP_MLME, gfp);
11200         return;
11201
11202  nla_put_failure:
11203         genlmsg_cancel(msg, hdr);
11204         nlmsg_free(msg);
11205 }
11206
11207 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
11208                           struct net_device *netdev, const u8 *buf,
11209                           size_t len, gfp_t gfp)
11210 {
11211         nl80211_send_mlme_event(rdev, netdev, buf, len,
11212                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
11213 }
11214
11215 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
11216                            struct net_device *netdev, const u8 *buf,
11217                            size_t len, gfp_t gfp, int uapsd_queues)
11218 {
11219         nl80211_send_mlme_event(rdev, netdev, buf, len,
11220                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
11221 }
11222
11223 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
11224                          struct net_device *netdev, const u8 *buf,
11225                          size_t len, gfp_t gfp)
11226 {
11227         nl80211_send_mlme_event(rdev, netdev, buf, len,
11228                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
11229 }
11230
11231 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
11232                            struct net_device *netdev, const u8 *buf,
11233                            size_t len, gfp_t gfp)
11234 {
11235         nl80211_send_mlme_event(rdev, netdev, buf, len,
11236                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
11237 }
11238
11239 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
11240                                   size_t len)
11241 {
11242         struct wireless_dev *wdev = dev->ieee80211_ptr;
11243         struct wiphy *wiphy = wdev->wiphy;
11244         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11245         const struct ieee80211_mgmt *mgmt = (void *)buf;
11246         u32 cmd;
11247
11248         if (WARN_ON(len < 2))
11249                 return;
11250
11251         if (ieee80211_is_deauth(mgmt->frame_control))
11252                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
11253         else
11254                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
11255
11256         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
11257         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
11258 }
11259 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
11260
11261 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
11262                                       struct net_device *netdev, int cmd,
11263                                       const u8 *addr, gfp_t gfp)
11264 {
11265         struct sk_buff *msg;
11266         void *hdr;
11267
11268         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11269         if (!msg)
11270                 return;
11271
11272         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11273         if (!hdr) {
11274                 nlmsg_free(msg);
11275                 return;
11276         }
11277
11278         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11279             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11280             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
11281             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
11282                 goto nla_put_failure;
11283
11284         genlmsg_end(msg, hdr);
11285
11286         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11287                                 NL80211_MCGRP_MLME, gfp);
11288         return;
11289
11290  nla_put_failure:
11291         genlmsg_cancel(msg, hdr);
11292         nlmsg_free(msg);
11293 }
11294
11295 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
11296                                struct net_device *netdev, const u8 *addr,
11297                                gfp_t gfp)
11298 {
11299         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
11300                                   addr, gfp);
11301 }
11302
11303 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
11304                                 struct net_device *netdev, const u8 *addr,
11305                                 gfp_t gfp)
11306 {
11307         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
11308                                   addr, gfp);
11309 }
11310
11311 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
11312                                  struct net_device *netdev, const u8 *bssid,
11313                                  const u8 *req_ie, size_t req_ie_len,
11314                                  const u8 *resp_ie, size_t resp_ie_len,
11315                                  u16 status, gfp_t gfp)
11316 {
11317         struct sk_buff *msg;
11318         void *hdr;
11319
11320         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11321         if (!msg)
11322                 return;
11323
11324         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
11325         if (!hdr) {
11326                 nlmsg_free(msg);
11327                 return;
11328         }
11329
11330         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11331             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11332             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
11333             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
11334             (req_ie &&
11335              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
11336             (resp_ie &&
11337              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
11338                 goto nla_put_failure;
11339
11340         genlmsg_end(msg, hdr);
11341
11342         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11343                                 NL80211_MCGRP_MLME, gfp);
11344         return;
11345
11346  nla_put_failure:
11347         genlmsg_cancel(msg, hdr);
11348         nlmsg_free(msg);
11349
11350 }
11351
11352 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
11353                          struct net_device *netdev, const u8 *bssid,
11354                          const u8 *req_ie, size_t req_ie_len,
11355                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
11356 {
11357         struct sk_buff *msg;
11358         void *hdr;
11359
11360         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11361         if (!msg)
11362                 return;
11363
11364         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
11365         if (!hdr) {
11366                 nlmsg_free(msg);
11367                 return;
11368         }
11369
11370         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11371             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11372             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
11373             (req_ie &&
11374              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
11375             (resp_ie &&
11376              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
11377                 goto nla_put_failure;
11378
11379         genlmsg_end(msg, hdr);
11380
11381         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11382                                 NL80211_MCGRP_MLME, gfp);
11383         return;
11384
11385  nla_put_failure:
11386         genlmsg_cancel(msg, hdr);
11387         nlmsg_free(msg);
11388
11389 }
11390
11391 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
11392                                struct net_device *netdev, u16 reason,
11393                                const u8 *ie, size_t ie_len, bool from_ap)
11394 {
11395         struct sk_buff *msg;
11396         void *hdr;
11397
11398         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11399         if (!msg)
11400                 return;
11401
11402         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
11403         if (!hdr) {
11404                 nlmsg_free(msg);
11405                 return;
11406         }
11407
11408         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11409             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11410             (from_ap && reason &&
11411              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
11412             (from_ap &&
11413              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
11414             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
11415                 goto nla_put_failure;
11416
11417         genlmsg_end(msg, hdr);
11418
11419         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11420                                 NL80211_MCGRP_MLME, GFP_KERNEL);
11421         return;
11422
11423  nla_put_failure:
11424         genlmsg_cancel(msg, hdr);
11425         nlmsg_free(msg);
11426
11427 }
11428
11429 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
11430                              struct net_device *netdev, const u8 *bssid,
11431                              gfp_t gfp)
11432 {
11433         struct sk_buff *msg;
11434         void *hdr;
11435
11436         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11437         if (!msg)
11438                 return;
11439
11440         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
11441         if (!hdr) {
11442                 nlmsg_free(msg);
11443                 return;
11444         }
11445
11446         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11447             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11448             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
11449                 goto nla_put_failure;
11450
11451         genlmsg_end(msg, hdr);
11452
11453         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11454                                 NL80211_MCGRP_MLME, gfp);
11455         return;
11456
11457  nla_put_failure:
11458         genlmsg_cancel(msg, hdr);
11459         nlmsg_free(msg);
11460 }
11461
11462 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
11463                                         const u8* ie, u8 ie_len, gfp_t gfp)
11464 {
11465         struct wireless_dev *wdev = dev->ieee80211_ptr;
11466         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
11467         struct sk_buff *msg;
11468         void *hdr;
11469
11470         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
11471                 return;
11472
11473         trace_cfg80211_notify_new_peer_candidate(dev, addr);
11474
11475         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11476         if (!msg)
11477                 return;
11478
11479         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
11480         if (!hdr) {
11481                 nlmsg_free(msg);
11482                 return;
11483         }
11484
11485         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11486             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11487             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
11488             (ie_len && ie &&
11489              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
11490                 goto nla_put_failure;
11491
11492         genlmsg_end(msg, hdr);
11493
11494         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11495                                 NL80211_MCGRP_MLME, gfp);
11496         return;
11497
11498  nla_put_failure:
11499         genlmsg_cancel(msg, hdr);
11500         nlmsg_free(msg);
11501 }
11502 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
11503
11504 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
11505                                  struct net_device *netdev, const u8 *addr,
11506                                  enum nl80211_key_type key_type, int key_id,
11507                                  const u8 *tsc, gfp_t gfp)
11508 {
11509         struct sk_buff *msg;
11510         void *hdr;
11511
11512         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11513         if (!msg)
11514                 return;
11515
11516         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
11517         if (!hdr) {
11518                 nlmsg_free(msg);
11519                 return;
11520         }
11521
11522         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11523             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11524             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
11525             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
11526             (key_id != -1 &&
11527              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
11528             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
11529                 goto nla_put_failure;
11530
11531         genlmsg_end(msg, hdr);
11532
11533         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11534                                 NL80211_MCGRP_MLME, gfp);
11535         return;
11536
11537  nla_put_failure:
11538         genlmsg_cancel(msg, hdr);
11539         nlmsg_free(msg);
11540 }
11541
11542 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
11543                                     struct ieee80211_channel *channel_before,
11544                                     struct ieee80211_channel *channel_after)
11545 {
11546         struct sk_buff *msg;
11547         void *hdr;
11548         struct nlattr *nl_freq;
11549
11550         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
11551         if (!msg)
11552                 return;
11553
11554         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
11555         if (!hdr) {
11556                 nlmsg_free(msg);
11557                 return;
11558         }
11559
11560         /*
11561          * Since we are applying the beacon hint to a wiphy we know its
11562          * wiphy_idx is valid
11563          */
11564         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
11565                 goto nla_put_failure;
11566
11567         /* Before */
11568         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
11569         if (!nl_freq)
11570                 goto nla_put_failure;
11571         if (nl80211_msg_put_channel(msg, channel_before, false))
11572                 goto nla_put_failure;
11573         nla_nest_end(msg, nl_freq);
11574
11575         /* After */
11576         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
11577         if (!nl_freq)
11578                 goto nla_put_failure;
11579         if (nl80211_msg_put_channel(msg, channel_after, false))
11580                 goto nla_put_failure;
11581         nla_nest_end(msg, nl_freq);
11582
11583         genlmsg_end(msg, hdr);
11584
11585         rcu_read_lock();
11586         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
11587                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
11588         rcu_read_unlock();
11589
11590         return;
11591
11592 nla_put_failure:
11593         genlmsg_cancel(msg, hdr);
11594         nlmsg_free(msg);
11595 }
11596
11597 static void nl80211_send_remain_on_chan_event(
11598         int cmd, struct cfg80211_registered_device *rdev,
11599         struct wireless_dev *wdev, u64 cookie,
11600         struct ieee80211_channel *chan,
11601         unsigned int duration, gfp_t gfp)
11602 {
11603         struct sk_buff *msg;
11604         void *hdr;
11605
11606         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11607         if (!msg)
11608                 return;
11609
11610         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11611         if (!hdr) {
11612                 nlmsg_free(msg);
11613                 return;
11614         }
11615
11616         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11617             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11618                                          wdev->netdev->ifindex)) ||
11619             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
11620             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
11621             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
11622                         NL80211_CHAN_NO_HT) ||
11623             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
11624                 goto nla_put_failure;
11625
11626         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
11627             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
11628                 goto nla_put_failure;
11629
11630         genlmsg_end(msg, hdr);
11631
11632         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11633                                 NL80211_MCGRP_MLME, gfp);
11634         return;
11635
11636  nla_put_failure:
11637         genlmsg_cancel(msg, hdr);
11638         nlmsg_free(msg);
11639 }
11640
11641 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
11642                                struct ieee80211_channel *chan,
11643                                unsigned int duration, gfp_t gfp)
11644 {
11645         struct wiphy *wiphy = wdev->wiphy;
11646         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11647
11648         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
11649         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
11650                                           rdev, wdev, cookie, chan,
11651                                           duration, gfp);
11652 }
11653 EXPORT_SYMBOL(cfg80211_ready_on_channel);
11654
11655 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
11656                                         struct ieee80211_channel *chan,
11657                                         gfp_t gfp)
11658 {
11659         struct wiphy *wiphy = wdev->wiphy;
11660         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11661
11662         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
11663         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
11664                                           rdev, wdev, cookie, chan, 0, gfp);
11665 }
11666 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
11667
11668 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
11669                       struct station_info *sinfo, gfp_t gfp)
11670 {
11671         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
11672         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11673         struct sk_buff *msg;
11674
11675         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
11676
11677         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11678         if (!msg)
11679                 return;
11680
11681         if (nl80211_send_station(msg, 0, 0, 0,
11682                                  rdev, dev, mac_addr, sinfo) < 0) {
11683                 nlmsg_free(msg);
11684                 return;
11685         }
11686
11687         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11688                                 NL80211_MCGRP_MLME, gfp);
11689 }
11690 EXPORT_SYMBOL(cfg80211_new_sta);
11691
11692 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
11693 {
11694         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
11695         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11696         struct sk_buff *msg;
11697         void *hdr;
11698
11699         trace_cfg80211_del_sta(dev, mac_addr);
11700
11701         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11702         if (!msg)
11703                 return;
11704
11705         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
11706         if (!hdr) {
11707                 nlmsg_free(msg);
11708                 return;
11709         }
11710
11711         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11712             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
11713                 goto nla_put_failure;
11714
11715         genlmsg_end(msg, hdr);
11716
11717         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11718                                 NL80211_MCGRP_MLME, gfp);
11719         return;
11720
11721  nla_put_failure:
11722         genlmsg_cancel(msg, hdr);
11723         nlmsg_free(msg);
11724 }
11725 EXPORT_SYMBOL(cfg80211_del_sta);
11726
11727 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
11728                           enum nl80211_connect_failed_reason reason,
11729                           gfp_t gfp)
11730 {
11731         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
11732         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11733         struct sk_buff *msg;
11734         void *hdr;
11735
11736         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
11737         if (!msg)
11738                 return;
11739
11740         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
11741         if (!hdr) {
11742                 nlmsg_free(msg);
11743                 return;
11744         }
11745
11746         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11747             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
11748             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
11749                 goto nla_put_failure;
11750
11751         genlmsg_end(msg, hdr);
11752
11753         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11754                                 NL80211_MCGRP_MLME, gfp);
11755         return;
11756
11757  nla_put_failure:
11758         genlmsg_cancel(msg, hdr);
11759         nlmsg_free(msg);
11760 }
11761 EXPORT_SYMBOL(cfg80211_conn_failed);
11762
11763 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
11764                                        const u8 *addr, gfp_t gfp)
11765 {
11766         struct wireless_dev *wdev = dev->ieee80211_ptr;
11767         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
11768         struct sk_buff *msg;
11769         void *hdr;
11770         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
11771
11772         if (!nlportid)
11773                 return false;
11774
11775         msg = nlmsg_new(100, gfp);
11776         if (!msg)
11777                 return true;
11778
11779         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11780         if (!hdr) {
11781                 nlmsg_free(msg);
11782                 return true;
11783         }
11784
11785         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11786             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11787             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
11788                 goto nla_put_failure;
11789
11790         genlmsg_end(msg, hdr);
11791         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11792         return true;
11793
11794  nla_put_failure:
11795         genlmsg_cancel(msg, hdr);
11796         nlmsg_free(msg);
11797         return true;
11798 }
11799
11800 bool cfg80211_rx_spurious_frame(struct net_device *dev,
11801                                 const u8 *addr, gfp_t gfp)
11802 {
11803         struct wireless_dev *wdev = dev->ieee80211_ptr;
11804         bool ret;
11805
11806         trace_cfg80211_rx_spurious_frame(dev, addr);
11807
11808         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
11809                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
11810                 trace_cfg80211_return_bool(false);
11811                 return false;
11812         }
11813         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
11814                                          addr, gfp);
11815         trace_cfg80211_return_bool(ret);
11816         return ret;
11817 }
11818 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
11819
11820 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
11821                                         const u8 *addr, gfp_t gfp)
11822 {
11823         struct wireless_dev *wdev = dev->ieee80211_ptr;
11824         bool ret;
11825
11826         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
11827
11828         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
11829                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
11830                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
11831                 trace_cfg80211_return_bool(false);
11832                 return false;
11833         }
11834         ret = __nl80211_unexpected_frame(dev,
11835                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
11836                                          addr, gfp);
11837         trace_cfg80211_return_bool(ret);
11838         return ret;
11839 }
11840 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
11841
11842 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
11843                       struct wireless_dev *wdev, u32 nlportid,
11844                       int freq, int sig_dbm,
11845                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
11846 {
11847         struct net_device *netdev = wdev->netdev;
11848         struct sk_buff *msg;
11849         void *hdr;
11850
11851         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11852         if (!msg)
11853                 return -ENOMEM;
11854
11855         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
11856         if (!hdr) {
11857                 nlmsg_free(msg);
11858                 return -ENOMEM;
11859         }
11860
11861         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11862             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11863                                         netdev->ifindex)) ||
11864             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
11865             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
11866             (sig_dbm &&
11867              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
11868             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
11869             (flags &&
11870              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
11871                 goto nla_put_failure;
11872
11873         genlmsg_end(msg, hdr);
11874
11875         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11876
11877  nla_put_failure:
11878         genlmsg_cancel(msg, hdr);
11879         nlmsg_free(msg);
11880         return -ENOBUFS;
11881 }
11882
11883 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
11884                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
11885 {
11886         struct wiphy *wiphy = wdev->wiphy;
11887         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11888         struct net_device *netdev = wdev->netdev;
11889         struct sk_buff *msg;
11890         void *hdr;
11891
11892         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
11893
11894         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11895         if (!msg)
11896                 return;
11897
11898         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
11899         if (!hdr) {
11900                 nlmsg_free(msg);
11901                 return;
11902         }
11903
11904         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11905             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11906                                    netdev->ifindex)) ||
11907             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
11908             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
11909             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
11910             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
11911                 goto nla_put_failure;
11912
11913         genlmsg_end(msg, hdr);
11914
11915         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11916                                 NL80211_MCGRP_MLME, gfp);
11917         return;
11918
11919  nla_put_failure:
11920         genlmsg_cancel(msg, hdr);
11921         nlmsg_free(msg);
11922 }
11923 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
11924
11925 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
11926                                             const char *mac, gfp_t gfp)
11927 {
11928         struct wireless_dev *wdev = dev->ieee80211_ptr;
11929         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
11930         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11931         void **cb;
11932
11933         if (!msg)
11934                 return NULL;
11935
11936         cb = (void **)msg->cb;
11937
11938         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
11939         if (!cb[0]) {
11940                 nlmsg_free(msg);
11941                 return NULL;
11942         }
11943
11944         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11945             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
11946                 goto nla_put_failure;
11947
11948         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
11949                 goto nla_put_failure;
11950
11951         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
11952         if (!cb[1])
11953                 goto nla_put_failure;
11954
11955         cb[2] = rdev;
11956
11957         return msg;
11958  nla_put_failure:
11959         nlmsg_free(msg);
11960         return NULL;
11961 }
11962
11963 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
11964 {
11965         void **cb = (void **)msg->cb;
11966         struct cfg80211_registered_device *rdev = cb[2];
11967
11968         nla_nest_end(msg, cb[1]);
11969         genlmsg_end(msg, cb[0]);
11970
11971         memset(msg->cb, 0, sizeof(msg->cb));
11972
11973         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11974                                 NL80211_MCGRP_MLME, gfp);
11975 }
11976
11977 void cfg80211_cqm_rssi_notify(struct net_device *dev,
11978                               enum nl80211_cqm_rssi_threshold_event rssi_event,
11979                               gfp_t gfp)
11980 {
11981         struct sk_buff *msg;
11982
11983         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
11984
11985         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
11986                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
11987                 return;
11988
11989         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
11990         if (!msg)
11991                 return;
11992
11993         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
11994                         rssi_event))
11995                 goto nla_put_failure;
11996
11997         cfg80211_send_cqm(msg, gfp);
11998
11999         return;
12000
12001  nla_put_failure:
12002         nlmsg_free(msg);
12003 }
12004 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
12005
12006 void cfg80211_cqm_txe_notify(struct net_device *dev,
12007                              const u8 *peer, u32 num_packets,
12008                              u32 rate, u32 intvl, gfp_t gfp)
12009 {
12010         struct sk_buff *msg;
12011
12012         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12013         if (!msg)
12014                 return;
12015
12016         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
12017                 goto nla_put_failure;
12018
12019         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
12020                 goto nla_put_failure;
12021
12022         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
12023                 goto nla_put_failure;
12024
12025         cfg80211_send_cqm(msg, gfp);
12026         return;
12027
12028  nla_put_failure:
12029         nlmsg_free(msg);
12030 }
12031 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
12032
12033 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
12034                                  const u8 *peer, u32 num_packets, gfp_t gfp)
12035 {
12036         struct sk_buff *msg;
12037
12038         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
12039
12040         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12041         if (!msg)
12042                 return;
12043
12044         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
12045                 goto nla_put_failure;
12046
12047         cfg80211_send_cqm(msg, gfp);
12048         return;
12049
12050  nla_put_failure:
12051         nlmsg_free(msg);
12052 }
12053 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
12054
12055 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
12056 {
12057         struct sk_buff *msg;
12058
12059         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12060         if (!msg)
12061                 return;
12062
12063         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
12064                 goto nla_put_failure;
12065
12066         cfg80211_send_cqm(msg, gfp);
12067         return;
12068
12069  nla_put_failure:
12070         nlmsg_free(msg);
12071 }
12072 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
12073
12074 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
12075                                      struct net_device *netdev, const u8 *bssid,
12076                                      const u8 *replay_ctr, gfp_t gfp)
12077 {
12078         struct sk_buff *msg;
12079         struct nlattr *rekey_attr;
12080         void *hdr;
12081
12082         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12083         if (!msg)
12084                 return;
12085
12086         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
12087         if (!hdr) {
12088                 nlmsg_free(msg);
12089                 return;
12090         }
12091
12092         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12093             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12094             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12095                 goto nla_put_failure;
12096
12097         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
12098         if (!rekey_attr)
12099                 goto nla_put_failure;
12100
12101         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
12102                     NL80211_REPLAY_CTR_LEN, replay_ctr))
12103                 goto nla_put_failure;
12104
12105         nla_nest_end(msg, rekey_attr);
12106
12107         genlmsg_end(msg, hdr);
12108
12109         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12110                                 NL80211_MCGRP_MLME, gfp);
12111         return;
12112
12113  nla_put_failure:
12114         genlmsg_cancel(msg, hdr);
12115         nlmsg_free(msg);
12116 }
12117
12118 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
12119                                const u8 *replay_ctr, gfp_t gfp)
12120 {
12121         struct wireless_dev *wdev = dev->ieee80211_ptr;
12122         struct wiphy *wiphy = wdev->wiphy;
12123         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12124
12125         trace_cfg80211_gtk_rekey_notify(dev, bssid);
12126         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
12127 }
12128 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
12129
12130 static void
12131 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
12132                                struct net_device *netdev, int index,
12133                                const u8 *bssid, bool preauth, gfp_t gfp)
12134 {
12135         struct sk_buff *msg;
12136         struct nlattr *attr;
12137         void *hdr;
12138
12139         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12140         if (!msg)
12141                 return;
12142
12143         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
12144         if (!hdr) {
12145                 nlmsg_free(msg);
12146                 return;
12147         }
12148
12149         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12150             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12151                 goto nla_put_failure;
12152
12153         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
12154         if (!attr)
12155                 goto nla_put_failure;
12156
12157         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
12158             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
12159             (preauth &&
12160              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
12161                 goto nla_put_failure;
12162
12163         nla_nest_end(msg, attr);
12164
12165         genlmsg_end(msg, hdr);
12166
12167         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12168                                 NL80211_MCGRP_MLME, gfp);
12169         return;
12170
12171  nla_put_failure:
12172         genlmsg_cancel(msg, hdr);
12173         nlmsg_free(msg);
12174 }
12175
12176 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
12177                                      const u8 *bssid, bool preauth, gfp_t gfp)
12178 {
12179         struct wireless_dev *wdev = dev->ieee80211_ptr;
12180         struct wiphy *wiphy = wdev->wiphy;
12181         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12182
12183         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
12184         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
12185 }
12186 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
12187
12188 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
12189                                      struct net_device *netdev,
12190                                      struct cfg80211_chan_def *chandef,
12191                                      gfp_t gfp,
12192                                      enum nl80211_commands notif,
12193                                      u8 count)
12194 {
12195         struct sk_buff *msg;
12196         void *hdr;
12197
12198         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12199         if (!msg)
12200                 return;
12201
12202         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
12203         if (!hdr) {
12204                 nlmsg_free(msg);
12205                 return;
12206         }
12207
12208         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12209                 goto nla_put_failure;
12210
12211         if (nl80211_send_chandef(msg, chandef))
12212                 goto nla_put_failure;
12213
12214         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
12215             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
12216                         goto nla_put_failure;
12217
12218         genlmsg_end(msg, hdr);
12219
12220         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12221                                 NL80211_MCGRP_MLME, gfp);
12222         return;
12223
12224  nla_put_failure:
12225         genlmsg_cancel(msg, hdr);
12226         nlmsg_free(msg);
12227 }
12228
12229 void cfg80211_ch_switch_notify(struct net_device *dev,
12230                                struct cfg80211_chan_def *chandef)
12231 {
12232         struct wireless_dev *wdev = dev->ieee80211_ptr;
12233         struct wiphy *wiphy = wdev->wiphy;
12234         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12235
12236         ASSERT_WDEV_LOCK(wdev);
12237
12238         trace_cfg80211_ch_switch_notify(dev, chandef);
12239
12240         wdev->chandef = *chandef;
12241         wdev->preset_chandef = *chandef;
12242         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
12243                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
12244 }
12245 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
12246
12247 void cfg80211_ch_switch_started_notify(struct net_device *dev,
12248                                        struct cfg80211_chan_def *chandef,
12249                                        u8 count)
12250 {
12251         struct wireless_dev *wdev = dev->ieee80211_ptr;
12252         struct wiphy *wiphy = wdev->wiphy;
12253         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12254
12255         trace_cfg80211_ch_switch_started_notify(dev, chandef);
12256
12257         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
12258                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
12259 }
12260 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
12261
12262 void
12263 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
12264                      const struct cfg80211_chan_def *chandef,
12265                      enum nl80211_radar_event event,
12266                      struct net_device *netdev, gfp_t gfp)
12267 {
12268         struct sk_buff *msg;
12269         void *hdr;
12270
12271         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12272         if (!msg)
12273                 return;
12274
12275         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
12276         if (!hdr) {
12277                 nlmsg_free(msg);
12278                 return;
12279         }
12280
12281         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
12282                 goto nla_put_failure;
12283
12284         /* NOP and radar events don't need a netdev parameter */
12285         if (netdev) {
12286                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
12287
12288                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12289                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
12290                         goto nla_put_failure;
12291         }
12292
12293         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
12294                 goto nla_put_failure;
12295
12296         if (nl80211_send_chandef(msg, chandef))
12297                 goto nla_put_failure;
12298
12299         genlmsg_end(msg, hdr);
12300
12301         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12302                                 NL80211_MCGRP_MLME, gfp);
12303         return;
12304
12305  nla_put_failure:
12306         genlmsg_cancel(msg, hdr);
12307         nlmsg_free(msg);
12308 }
12309
12310 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
12311                            u64 cookie, bool acked, gfp_t gfp)
12312 {
12313         struct wireless_dev *wdev = dev->ieee80211_ptr;
12314         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12315         struct sk_buff *msg;
12316         void *hdr;
12317
12318         trace_cfg80211_probe_status(dev, addr, cookie, acked);
12319
12320         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12321
12322         if (!msg)
12323                 return;
12324
12325         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
12326         if (!hdr) {
12327                 nlmsg_free(msg);
12328                 return;
12329         }
12330
12331         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12332             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12333             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12334             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
12335             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
12336                 goto nla_put_failure;
12337
12338         genlmsg_end(msg, hdr);
12339
12340         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12341                                 NL80211_MCGRP_MLME, gfp);
12342         return;
12343
12344  nla_put_failure:
12345         genlmsg_cancel(msg, hdr);
12346         nlmsg_free(msg);
12347 }
12348 EXPORT_SYMBOL(cfg80211_probe_status);
12349
12350 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
12351                                  const u8 *frame, size_t len,
12352                                  int freq, int sig_dbm)
12353 {
12354         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12355         struct sk_buff *msg;
12356         void *hdr;
12357         struct cfg80211_beacon_registration *reg;
12358
12359         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
12360
12361         spin_lock_bh(&rdev->beacon_registrations_lock);
12362         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
12363                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
12364                 if (!msg) {
12365                         spin_unlock_bh(&rdev->beacon_registrations_lock);
12366                         return;
12367                 }
12368
12369                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12370                 if (!hdr)
12371                         goto nla_put_failure;
12372
12373                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12374                     (freq &&
12375                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
12376                     (sig_dbm &&
12377                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12378                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
12379                         goto nla_put_failure;
12380
12381                 genlmsg_end(msg, hdr);
12382
12383                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
12384         }
12385         spin_unlock_bh(&rdev->beacon_registrations_lock);
12386         return;
12387
12388  nla_put_failure:
12389         spin_unlock_bh(&rdev->beacon_registrations_lock);
12390         if (hdr)
12391                 genlmsg_cancel(msg, hdr);
12392         nlmsg_free(msg);
12393 }
12394 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
12395
12396 #ifdef CONFIG_PM
12397 static int cfg80211_net_detect_results(struct sk_buff *msg,
12398                                        struct cfg80211_wowlan_wakeup *wakeup)
12399 {
12400         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
12401         struct nlattr *nl_results, *nl_match, *nl_freqs;
12402         int i, j;
12403
12404         nl_results = nla_nest_start(
12405                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
12406         if (!nl_results)
12407                 return -EMSGSIZE;
12408
12409         for (i = 0; i < nd->n_matches; i++) {
12410                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
12411
12412                 nl_match = nla_nest_start(msg, i);
12413                 if (!nl_match)
12414                         break;
12415
12416                 /* The SSID attribute is optional in nl80211, but for
12417                  * simplicity reasons it's always present in the
12418                  * cfg80211 structure.  If a driver can't pass the
12419                  * SSID, that needs to be changed.  A zero length SSID
12420                  * is still a valid SSID (wildcard), so it cannot be
12421                  * used for this purpose.
12422                  */
12423                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
12424                             match->ssid.ssid)) {
12425                         nla_nest_cancel(msg, nl_match);
12426                         goto out;
12427                 }
12428
12429                 if (match->n_channels) {
12430                         nl_freqs = nla_nest_start(
12431                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
12432                         if (!nl_freqs) {
12433                                 nla_nest_cancel(msg, nl_match);
12434                                 goto out;
12435                         }
12436
12437                         for (j = 0; j < match->n_channels; j++) {
12438                                 if (nla_put_u32(msg,
12439                                                 NL80211_ATTR_WIPHY_FREQ,
12440                                                 match->channels[j])) {
12441                                         nla_nest_cancel(msg, nl_freqs);
12442                                         nla_nest_cancel(msg, nl_match);
12443                                         goto out;
12444                                 }
12445                         }
12446
12447                         nla_nest_end(msg, nl_freqs);
12448                 }
12449
12450                 nla_nest_end(msg, nl_match);
12451         }
12452
12453 out:
12454         nla_nest_end(msg, nl_results);
12455         return 0;
12456 }
12457
12458 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
12459                                    struct cfg80211_wowlan_wakeup *wakeup,
12460                                    gfp_t gfp)
12461 {
12462         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12463         struct sk_buff *msg;
12464         void *hdr;
12465         int size = 200;
12466
12467         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
12468
12469         if (wakeup)
12470                 size += wakeup->packet_present_len;
12471
12472         msg = nlmsg_new(size, gfp);
12473         if (!msg)
12474                 return;
12475
12476         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
12477         if (!hdr)
12478                 goto free_msg;
12479
12480         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12481             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
12482                 goto free_msg;
12483
12484         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12485                                         wdev->netdev->ifindex))
12486                 goto free_msg;
12487
12488         if (wakeup) {
12489                 struct nlattr *reasons;
12490
12491                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
12492                 if (!reasons)
12493                         goto free_msg;
12494
12495                 if (wakeup->disconnect &&
12496                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
12497                         goto free_msg;
12498                 if (wakeup->magic_pkt &&
12499                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
12500                         goto free_msg;
12501                 if (wakeup->gtk_rekey_failure &&
12502                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
12503                         goto free_msg;
12504                 if (wakeup->eap_identity_req &&
12505                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
12506                         goto free_msg;
12507                 if (wakeup->four_way_handshake &&
12508                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
12509                         goto free_msg;
12510                 if (wakeup->rfkill_release &&
12511                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
12512                         goto free_msg;
12513
12514                 if (wakeup->pattern_idx >= 0 &&
12515                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
12516                                 wakeup->pattern_idx))
12517                         goto free_msg;
12518
12519                 if (wakeup->tcp_match &&
12520                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
12521                         goto free_msg;
12522
12523                 if (wakeup->tcp_connlost &&
12524                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
12525                         goto free_msg;
12526
12527                 if (wakeup->tcp_nomoretokens &&
12528                     nla_put_flag(msg,
12529                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
12530                         goto free_msg;
12531
12532                 if (wakeup->packet) {
12533                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
12534                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
12535
12536                         if (!wakeup->packet_80211) {
12537                                 pkt_attr =
12538                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
12539                                 len_attr =
12540                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
12541                         }
12542
12543                         if (wakeup->packet_len &&
12544                             nla_put_u32(msg, len_attr, wakeup->packet_len))
12545                                 goto free_msg;
12546
12547                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
12548                                     wakeup->packet))
12549                                 goto free_msg;
12550                 }
12551
12552                 if (wakeup->net_detect &&
12553                     cfg80211_net_detect_results(msg, wakeup))
12554                                 goto free_msg;
12555
12556                 nla_nest_end(msg, reasons);
12557         }
12558
12559         genlmsg_end(msg, hdr);
12560
12561         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12562                                 NL80211_MCGRP_MLME, gfp);
12563         return;
12564
12565  free_msg:
12566         nlmsg_free(msg);
12567 }
12568 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
12569 #endif
12570
12571 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
12572                                 enum nl80211_tdls_operation oper,
12573                                 u16 reason_code, gfp_t gfp)
12574 {
12575         struct wireless_dev *wdev = dev->ieee80211_ptr;
12576         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12577         struct sk_buff *msg;
12578         void *hdr;
12579
12580         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
12581                                          reason_code);
12582
12583         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12584         if (!msg)
12585                 return;
12586
12587         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
12588         if (!hdr) {
12589                 nlmsg_free(msg);
12590                 return;
12591         }
12592
12593         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12594             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12595             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
12596             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
12597             (reason_code > 0 &&
12598              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
12599                 goto nla_put_failure;
12600
12601         genlmsg_end(msg, hdr);
12602
12603         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12604                                 NL80211_MCGRP_MLME, gfp);
12605         return;
12606
12607  nla_put_failure:
12608         genlmsg_cancel(msg, hdr);
12609         nlmsg_free(msg);
12610 }
12611 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
12612
12613 static int nl80211_netlink_notify(struct notifier_block * nb,
12614                                   unsigned long state,
12615                                   void *_notify)
12616 {
12617         struct netlink_notify *notify = _notify;
12618         struct cfg80211_registered_device *rdev;
12619         struct wireless_dev *wdev;
12620         struct cfg80211_beacon_registration *reg, *tmp;
12621
12622         if (state != NETLINK_URELEASE)
12623                 return NOTIFY_DONE;
12624
12625         rcu_read_lock();
12626
12627         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
12628                 bool schedule_destroy_work = false;
12629                 bool schedule_scan_stop = false;
12630                 struct cfg80211_sched_scan_request *sched_scan_req =
12631                         rcu_dereference(rdev->sched_scan_req);
12632
12633                 if (sched_scan_req && notify->portid &&
12634                     sched_scan_req->owner_nlportid == notify->portid)
12635                         schedule_scan_stop = true;
12636
12637                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list) {
12638                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
12639
12640                         if (wdev->owner_nlportid == notify->portid)
12641                                 schedule_destroy_work = true;
12642                 }
12643
12644                 spin_lock_bh(&rdev->beacon_registrations_lock);
12645                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
12646                                          list) {
12647                         if (reg->nlportid == notify->portid) {
12648                                 list_del(&reg->list);
12649                                 kfree(reg);
12650                                 break;
12651                         }
12652                 }
12653                 spin_unlock_bh(&rdev->beacon_registrations_lock);
12654
12655                 if (schedule_destroy_work) {
12656                         struct cfg80211_iface_destroy *destroy;
12657
12658                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
12659                         if (destroy) {
12660                                 destroy->nlportid = notify->portid;
12661                                 spin_lock(&rdev->destroy_list_lock);
12662                                 list_add(&destroy->list, &rdev->destroy_list);
12663                                 spin_unlock(&rdev->destroy_list_lock);
12664                                 schedule_work(&rdev->destroy_work);
12665                         }
12666                 } else if (schedule_scan_stop) {
12667                         sched_scan_req->owner_nlportid = 0;
12668
12669                         if (rdev->ops->sched_scan_stop &&
12670                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
12671                                 schedule_work(&rdev->sched_scan_stop_wk);
12672                 }
12673         }
12674
12675         rcu_read_unlock();
12676
12677         return NOTIFY_OK;
12678 }
12679
12680 static struct notifier_block nl80211_netlink_notifier = {
12681         .notifier_call = nl80211_netlink_notify,
12682 };
12683
12684 void cfg80211_ft_event(struct net_device *netdev,
12685                        struct cfg80211_ft_event_params *ft_event)
12686 {
12687         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
12688         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12689         struct sk_buff *msg;
12690         void *hdr;
12691
12692         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
12693
12694         if (!ft_event->target_ap)
12695                 return;
12696
12697         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12698         if (!msg)
12699                 return;
12700
12701         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
12702         if (!hdr)
12703                 goto out;
12704
12705         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12706             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12707             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
12708                 goto out;
12709
12710         if (ft_event->ies &&
12711             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
12712                 goto out;
12713         if (ft_event->ric_ies &&
12714             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
12715                     ft_event->ric_ies))
12716                 goto out;
12717
12718         genlmsg_end(msg, hdr);
12719
12720         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12721                                 NL80211_MCGRP_MLME, GFP_KERNEL);
12722         return;
12723  out:
12724         nlmsg_free(msg);
12725 }
12726 EXPORT_SYMBOL(cfg80211_ft_event);
12727
12728 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
12729 {
12730         struct cfg80211_registered_device *rdev;
12731         struct sk_buff *msg;
12732         void *hdr;
12733         u32 nlportid;
12734
12735         rdev = wiphy_to_rdev(wdev->wiphy);
12736         if (!rdev->crit_proto_nlportid)
12737                 return;
12738
12739         nlportid = rdev->crit_proto_nlportid;
12740         rdev->crit_proto_nlportid = 0;
12741
12742         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12743         if (!msg)
12744                 return;
12745
12746         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
12747         if (!hdr)
12748                 goto nla_put_failure;
12749
12750         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12751             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
12752                 goto nla_put_failure;
12753
12754         genlmsg_end(msg, hdr);
12755
12756         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12757         return;
12758
12759  nla_put_failure:
12760         if (hdr)
12761                 genlmsg_cancel(msg, hdr);
12762         nlmsg_free(msg);
12763
12764 }
12765 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
12766
12767 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
12768 {
12769         struct wiphy *wiphy = wdev->wiphy;
12770         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12771         struct sk_buff *msg;
12772         void *hdr;
12773
12774         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12775         if (!msg)
12776                 return;
12777
12778         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
12779         if (!hdr)
12780                 goto out;
12781
12782         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12783             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
12784             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
12785                 goto out;
12786
12787         genlmsg_end(msg, hdr);
12788
12789         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
12790                                 NL80211_MCGRP_MLME, GFP_KERNEL);
12791         return;
12792  out:
12793         nlmsg_free(msg);
12794 }
12795
12796 /* initialisation/exit functions */
12797
12798 int nl80211_init(void)
12799 {
12800         int err;
12801
12802         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
12803                                                    nl80211_mcgrps);
12804         if (err)
12805                 return err;
12806
12807         err = netlink_register_notifier(&nl80211_netlink_notifier);
12808         if (err)
12809                 goto err_out;
12810
12811         return 0;
12812  err_out:
12813         genl_unregister_family(&nl80211_fam);
12814         return err;
12815 }
12816
12817 void nl80211_exit(void)
12818 {
12819         netlink_unregister_notifier(&nl80211_netlink_notifier);
12820         genl_unregister_family(&nl80211_fam);
12821 }